Apple today seeded new Developer Beta builds of all of its operating systems today, including iOS 10.3.2, macOS 10.12.5 Sierra, watchOS 3.2.2, and tvOS 10.2.1. As is indicated by the version numbers, there aren't any new features in them; instead, they focus on fixes and stability improvements.
The news comes just a week after the company released beta 2, which arrived two weeks after the first builds.
The release notes for iOS 10.3.2 only show two fixes, which are that SiriKit car commands and third-party VPN apps should now work as expected. As usual, the notes for macOS 10.12.5 Sierra say exactly nothing about what's included.
For watchOS 3.2.2, there are a few known issues that have to do with Xcode, so nothing front-facing. Finally, the tvOS 10.2.1 notes state that there are no known issues in the build.
For iOS and macOS, we'll probably see new Public Beta builds within the next couple of days. If you're not on the betas at all, it shouldn't be too long before Apple decides to release them.