Over at the MS SCOM engineering Blog it’s been newly released that SCOM 2012 R2 now supports SQL Server 2008 R2 SP3.
There is a catch though see below for what to be aware of:
Issue: Fresh Install of SCOM 2012 R2 on SQL 2008 R2 SP3 will not work
Workaround: Deploy SCOM 2012 R2 on to SQL 2008 R2 SP2 and after installation upgrade the DB to SQL 2008 R2 SP3