plasma5-desktop from openSUSE:Backports:SLE-12-SP3 project
Selecione seu sistema operacional
Adicionar repositório e instalar manualmente
Para standard execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:Backports:SLE-12-SP3/standard/openSUSE:Backports:SLE-12-SP3.repo zypper refresh zypper install plasma5-desktop