We will declare release candidate builds for AMD64 and ARM64 on May 15th. If no objections in the following two weeks those release candidates will become the official release builds and will be shown on REC Installation Guide in the "Obtaining the ISO Image" section.
Need final re-read of documentation to look for anything that may have changed between R2 and R3
Need to write release notes similar to Release 1 - May 28, 2019 and Release 2. The release notes should highlight the fact that ARM support is new in R3.