Appellate Cure of Defective Diversity Jurisdiction by Dropping a Dispensable Nondiverse Party Under Rule 21

Introduction

In Randall Winslow v. Extra Space Storage, No. 25-2249 (3d Cir. Apr. 24, 2026) (not precedential), the Third Circuit reviewed a pro se appeal arising from alleged damage to property stored in two rented storage units at an Extra Space Storage (“ESS”) facility in Malvern, Pennsylvania. Randall Winslow claimed that “valuable family heirlooms, antiques, and documents” were damaged by large temperature fluctuations. He sued ESS and the facility’s district manager, Logan Harmon, asserting negligence, breach of contract, and several fraud- and consumer-protection-based theories.

The case presented two central issues: (1) whether federal diversity jurisdiction was properly established given pleading defects as to citizenship (and, specifically, the presence of an allegedly nondiverse individual defendant), and (2) whether the District Court correctly granted summary judgment to the defendants based on contract terms (including an exculpatory clause, a contractual one-year limitations period, and express disclaimers of climate control).

Summary of the Opinion

The Third Circuit affirmed the District Court’s grant of summary judgment. Before reaching the merits, however, the Court confronted a jurisdictional deficiency: Winslow’s pleadings did not establish complete diversity, and his appellate submissions still failed to demonstrate diversity between Winslow and Harmon. Rather than dismiss the case outright, the Court invoked Federal Rule of Civil Procedure 21 to dismiss Harmon as a “dispensable” party, thereby curing the diversity defect and allowing the Court to proceed against the diverse defendant, ESS.

On the merits, the Third Circuit found no basis to disturb the District Court’s determinations that: (1) the negligence claim was barred by a contractual exculpatory clause and by a one-year contractual limitations period; (2) the breach-of-contract claim was barred by the same one-year period and also failed because the agreement expressly disclaimed constant internal temperature or humidity control and disclaimed any guarantee of temperature or humidity ranges; and (3) the fraud, deceptive practices, and misrepresentation-type claims failed because no reasonable juror could find reasonable reliance in light of the contract’s explicit disclaimers.

The Court also denied Winslow’s motion to supplement the appellate record with post-summary-judgment materials, citing the absence of “exceptional circumstances.”

Analysis

Precedents Cited

Peace Church Risk Retention Grp. v. Johnson Controls Fire Prot. LP, 49 F.4th 866 (3d Cir. 2022)
The Court relied on this decision for the “complete diversity” requirement—i.e., at the time the complaint is filed, “no party can be a citizen of the same state as any opposing party.” This framed the jurisdictional defect as a threshold issue that had to be resolved before merits review.
In re Cmty. Bank of N. Va. Mortg. Lending Pracs. Litig., 911 F.3d 666 (3d Cir. 2018)
Cited for the principle that the party asserting federal jurisdiction bears the burden of establishing it. This mattered because Winslow, as the plaintiff invoking diversity jurisdiction, had to properly allege citizenship facts—something he did not do as to Harmon.
Zambelli v. Fireworks Mfg. Co. v. Wood, 592 F.3d 412 (3d Cir. 2010)
This was the key authority supporting the appellate remedy: under Federal Rule of Civil Procedure 21, a court may dismiss a dispensable, diversity-destroying party and proceed with the remaining parties. The Winslow panel used Zambelli to justify dropping Harmon rather than dismissing the entire appeal for want of diversity.
Steel Valley Auth. v. Union Switch & Signal Div., 809 F.2d 1006 (3d Cir. 1987)
Quoted (via Zambelli) for the standard of “indispensability”—whether a final decree can be made without affecting the dismissed party’s interest or producing an inequitable or inconsistent termination of the controversy. Applying that standard, the Court found Harmon dispensable, especially because Winslow alleged no personal-capacity wrongdoing by Harmon and conceded ESS was the core actor.
Barefoot Architect, Inc. v. Bunge, 632 F.3d 822 (3d Cir. 2011)
Cited for the summary-judgment lens: the non-movant’s evidence is believed and inferences drawn in his favor, but judgment is proper unless there is sufficient evidence for a reasonable jury to find for the nonmovant. This framed the Court’s deference to the District Court’s assessment that Winslow’s claims could not survive the contractual language and limitations bar.
Barna v. Bd. of Sch. Dirs. of Panther Valley Sch. Dist., 877 F.3d 136 (3d Cir. 2017)
Cited for the Third Circuit’s plenary (de novo) review of summary judgment. This signaled that the affirmance reflected agreement with the legal conclusions, not merely deference.
Burton v. Teleflex Inc., 707 F.3d 417 (3d Cir. 2013)
Used to deny expansion of the record on appeal with post-judgment evidence absent “exceptional circumstances,” underscoring the appellate norm that review is confined to the record before the trial court at the time of decision.

Legal Reasoning

1) Jurisdiction First: Complete Diversity, § 1653, and Rule 21

The Court began where it had to: subject-matter jurisdiction. Diversity jurisdiction under 28 U.S.C. § 1332(a) requires complete diversity at filing. The panel observed that Winslow’s District Court pleadings failed to establish complete diversity and that even on appeal his jurisdictional allegations did not show diversity as to Harmon.

The opinion then highlighted two “repair tools” with different functions:

28 U.S.C. § 1653 allows amendment of “defective allegations of jurisdiction.” This cures pleading defects (e.g., failing to specify citizenship correctly), but it does not magically create jurisdiction where the actual facts destroy it.
Federal Rule of Civil Procedure 21 allows a court to drop a party. When a nondiverse party is dispensable, dropping that party can cure the jurisdictional defect.

Applying Zambelli v. Fireworks Mfg. Co. v. Wood and the indispensability standard quoted from Steel Valley Auth. v. Union Switch & Signal Div., the panel concluded Harmon was dispensable—particularly because Winslow did not allege Harman’s personal-capacity misconduct and acknowledged ESS’s conduct was central. The Court therefore dismissed Harmon and proceeded against ESS.

2) Merits: Contractual Risk Allocation and Reliance Defeated by Express Disclaimers

After curing jurisdiction, the Court affirmed the summary judgment “for substantially the reasons set forth” in the District Court’s opinion—signaling that the contractual text controlled the outcome across claims.

Negligence: The District Court held the negligence claim barred by (a) an exculpatory clause and (b) a one-year contractual limitations period. The exculpatory clause broadly disclaimed liability for “any damage or loss” arising “from any cause whatsoever,” except for “fraud, gross negligence or willful violation of law,” and included an indemnification obligation even where damage was caused partly by the operator’s negligence. The District Court also rejected arguments that the clause was an unconscionable adhesion term or otherwise unenforceable.
Breach of Contract: The District Court found the claim time-barred under the one-year contractual limitations period and, independently, found no breach because the agreement stated ESS “does not provide constant internal temperature or humidity control,” “does not warrant or guarantee temperature or humidity ranges,” and provided “NO OTHER WARRANTIES.”
Unfair trade practices, fraud, fraud by deception, negligent misrepresentation: These claims turned on reasonable reliance. The District Court concluded (and the Third Circuit agreed) that no reasonable juror could find Winslow reasonably relied on statements inconsistent with explicit contractual disclaimers that ESS did not guarantee temperature or humidity ranges.

3) Appellate Record Limits

The Third Circuit denied Winslow’s motion to supplement the record with post-summary-judgment evidence, invoking Burton v. Teleflex Inc. and the requirement of “exceptional circumstances.” The ruling reinforces a practical procedural boundary: even potentially relevant later-developed evidence generally cannot be used to overturn a summary judgment that was correct on the record that existed.

Impact

Although designated “NOT PRECEDENTIAL” under I.O.P. 5.7, the opinion illustrates (and operationalizes) two recurring points likely to affect future litigation:

Jurisdictional housekeeping on appeal: The case is a clear example of the Third Circuit’s willingness to preserve a diversity case by using Rule 21 to drop a dispensable, diversity-destroying party when all parties agree dispensability is satisfied. For practitioners, it underscores the importance of (a) pleading citizenship correctly at the outset, and (b) recognizing that misjoinder of a nondiverse, nonessential employee/agent defendant may be curable—though not guaranteed—on appeal.
Contract text as a cross-claim defense: The affirmance signals how a carefully drafted storage-unit agreement can simultaneously (a) narrow or eliminate negligence exposure via exculpation, (b) reduce litigation risk via short contractual limitations periods, and (c) defeat reliance-based theories through explicit disclaimers that negate alleged representations (here, about climate control). For plaintiffs, it highlights the need to identify evidence that fits within the contract’s carve-outs (e.g., “fraud, gross negligence or willful violation of law”) and to file within contractually shortened periods.

Complex Concepts Simplified

Complete diversity: In diversity cases, every plaintiff must be a citizen of a different state than every defendant. If even one defendant shares citizenship with the plaintiff, the federal court generally lacks jurisdiction.
Defective jurisdictional allegations vs. defective jurisdictional facts (28 U.S.C. § 1653): Section 1653 lets parties fix how they stated jurisdiction (e.g., forgetting to allege citizenship). It does not fix jurisdiction if the underlying facts mean diversity is actually absent.
Dispensable vs. indispensable parties (Rule 21): A dispensable party is someone the court can drop without unfairly harming that person’s interests or making the case impossible to resolve fairly. Dropping a dispensable nondiverse party can restore diversity jurisdiction.
Exculpatory clause: A contract term where one party limits or waives liability for certain harms. Here it broadly disclaimed liability for loss or damage to stored property, subject to carve-outs like “fraud” or “gross negligence.”
Contractual limitations period: A contract can require that any lawsuit be filed within a shortened time window (here, one year). If enforceable, filing after that window can bar the claim even if the general statutory limitations period is longer.
Reasonable reliance: Many fraud- and deception-based claims require the plaintiff to show he reasonably relied on the defendant’s statement. If a written contract clearly contradicts the alleged statement, courts often find reliance unreasonable.

Conclusion

The Third Circuit’s decision in Winslow v. Extra Space Storage is a procedural-and-contractual blueprint: procedurally, it demonstrates the appellate cure of a diversity defect by dismissing a dispensable, diversity-destroying party under Rule 21 (as described in Zambelli v. Fireworks Mfg. Co. v. Wood), rather than reflexively dismissing for lack of jurisdiction; substantively, it confirms that explicit contractual disclaimers, exculpatory language, and shortened contractual limitations periods can decisively defeat negligence, contract, and reliance-based tort/consumer claims at summary judgment when the record cannot support an exception (such as fraud or gross negligence) or timely filing.