Xcode 11.0 Beta 3 was released on 2 Jul 2019 and requires macOS 10.14.4+.
It can be downloaded from https://download.developer.apple.com/Developer_Tools/Xcode_11_Beta_3/Xcode_11_Beta_3.xip.
Release notes are located at https://developer.apple.com/documentation/xcode_release_notes/xcode_11_beta_3_release_notes.
The SDKs it contains are:
- iOS 13.0 (Build 17A5522e)
- macOS 10.15 (Build 19A501g)
- tvOS 13.0 (Build 17J5515e)
- watchOS 6.0 (Build 17R5521e)
The compilers it contains are:
- clang 11.0.0 (Build 1100.0.28.3)
- swift 5.1 (Build 1100.0.212.5)