iPadOS 12.3 (build 16F5139e) is an official Apple over-the-air update for the iPad Pro 3 (11-inch, Cellular), released on 2019-04-22T17:08:32Z. The update package is 382.06 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f8d3a8135918e4424dad90e54f38d568cc50cc3d.zip.