iPadOS 9.3.5 (build 13G36) is an official Apple over-the-air update for the iPad 3 (GSM), released on 2016-08-25T16:53:13Z. The update package is 936.01 MB. This is a delta (partial) update that requires 8.4.1 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: dc1bf400dbc4c24fbcff03ce8f59685dfaa43021.zip.