iPadOS 12.1.3 (build 16D5032a) is an official Apple over-the-air update for the iPad Pro 3 (11-inch, WiFi), released on 2018-12-19T18:06:47Z. The update package is 317.21 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4aba137aa27605169c2aa1c77b6b7f5685e29c10.zip.