zypper from zypp:SLE-15-SP3-Branch project
Select Your Operating System
Add repository and install manually
For openSUSE Leap 15.3 Update run the following as root:
zypper addrepo https://download.opensuse.org/repositories/zypp:SLE-15-SP3-Branch/openSUSE_Leap_15.3_Update/zypp:SLE-15-SP3-Branch.repo zypper refresh zypper install zypper
For SLE 15 SP3 Update run the following as root:
zypper addrepo https://download.opensuse.org/repositories/zypp:SLE-15-SP3-Branch/SLE_15_SP3_Update/zypp:SLE-15-SP3-Branch.repo zypper refresh zypper install zypper