https://wccftech.com/apple-releases-beta-3-of-ios-14-3-watchos-7-2-tvos-14-3-to-developers-download-now/

Today, Apple has seen fit to release beta 3 of its upcoming iOS 14.3, iPadOS 14.3, watchOS 7.2, and tvOS 14.3 to developers for testing purposes. The new beta builds arrive two weeks after the release of the second beta. If you're a developer and want to test out the new beta, you can download it straight from Apple.

If you're interested in trying out the new iOS 14.3 and iPadOS 14.3 beta 3, it is available for all compatible iPhone and iPad models. You can download beta 3 through the Apple Developer Center or over the air using an appropriate profile installed through the Developer Center.