iPadOS 13.5 (build 17F5054h) is an official Apple over-the-air update for the iPad Pro 3 (11-inch, WiFi), released on 2020-04-29T17:06:58Z. The update package is 369.18 MB. This is a delta (partial) update that requires 13.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 76165167744feade60e7995eec867a90216f584c.zip.