iPadOS 13.3 (build 17C5046a) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, Cellular), released on 2019-11-20T18:04:09Z. The update package is 374.75 MB. This is a delta (partial) update that requires 13.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b07b718ada184413b0c1ef9b330dcfdb33e6f934.zip.