openSUSE Leap 15.3 GM was originally aiming at May 21st for the Gold Master.
However, the SUSE Linux Enteprirse 15 SP3 GM is not expected this workweek and Leap on top of that needs at least additional two days for rebuild.
I think Tuesday would be realistic date if there will be no further blockers.
openSUSE Leap's Gold Master date hsa always been driven by SUSE Linux Enterprise GM availability but now it is enforced even more by requirement of SLE binary availability.
Thank you for your understanding
Lubos Kocman Release Manager openSUSE Leap