iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad Pro (10.5-inch, WiFi), released on 2018-03-29T17:11:12Z. The update package is 726.15 MB. This is a delta (partial) update that requires 11.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 85a016fe439f08df3086041a89e23703ae12f18b.zip.