iPadOS 11.3 (build 15E5201e) is an official Apple over-the-air update for the iPad Pro (10.5-inch, WiFi), released on 2018-03-05T18:13:58Z. The update package is 269.05 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: bc494beb965e01fbff04043585e23880b9b3dc29.zip.