Apple has released the the third beta for iOS 9.3.3 to both developers and public beta testers. Interested developers can now grab the latest release from the Developer Downloads section of the Apple's website. This latest beta release clocks in at build number 13G29.
This beta follows the full release of iOS 9.3.2 several weeks ago. It's unclear what will be included in this latest version once it rolls out to everyone, but it's likely to contain a number of bug fixes.