iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-03-29T17:08:01Z. The update package is 614.55 MB. This is a delta (partial) update that requires 11.2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2f19c437efe1e5745d0f6d0fd7d9d6a35ea33788.zip.