The expectation was for new beta versions of iOS 10, macOS 10.12, watchOS 3 and tvOS 10, but Apple ?preferred? today to release the fourth test versions of iOS 9.3.3 (compilation 13G33), from OS X 10.11.6 (15G24b) and the tvOS 9.2.2 (13Y824).
In addition, Apple also made available OS X Server 5.1.6 beta (155S7053). As has been happening recently, only watchOS was left out.
Like the other two betas, these basically focus on general improvements and bug fixes. Should any interesting news arise (which is unlikely), we will notify you here on the site.