iPadOS 9.9.12.3 (build 16F5139e) is an official Apple over-the-air update for the iPad Pro 3 (11-inch, Cellular, 1TB Model), released on 2019-04-22T17:08:34Z. The update package is 2.69 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c9c6ac65598b636062b4eeaa765e87179eada04f.zip.