iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad Pro (10.5-inch, WiFi), released on 2018-03-29T17:11:11Z. The update package is 1.36 GB. This is a delta (partial) update that requires 10.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 664095cdea492f66ba0ef60c3365f1f5144f866d.zip.