For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:samba:ADDC/openSUSE_Tumbleweed/network:samba:ADDC.repo
zypper refresh
zypper install samba-libs-32bit
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:samba:ADDC/openSUSE_Factory/network:samba:ADDC.repo
zypper refresh
zypper install samba-libs-32bit
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:samba:ADDC/15.4/network:samba:ADDC.repo
zypper refresh
zypper install samba-libs-32bit