iPadOS 11.3 (build 15E5201e) is an official Apple over-the-air update for the iPad Pro 9.7-inch (WiFi), released on 2018-03-05T18:13:56Z. The update package is 288.5 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7412a621be969c50ecdb5d0d45bdcb0669333198.zip.