iPadOS 9.3.5 (build 13G36) is an official Apple over-the-air update for the iPad 3 (WiFi), released on 2016-08-25T16:53:12Z. The update package is 197.58 MB. This is a delta (partial) update that requires 9.2.1 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 5bcbed00d55244222ba35829a6866c0e7879be1e.zip.