Yes, as per that link SQL Server 2012 SP3 is supported with 10.3.x and 10.4.x both. That link mentions only the supported base versions, indicating SPs above it are automatically supported, unless specifically mentioned as 'not supported' on that same page.
Just because others faced issue while using SQL Server 2012, does not mean that you may do so as well. A lot of things may matter: data size, Server Configuration, DBMS configuration, N/w.
So you should rather test with SQL Server 2012 first on a test server, to see for yourself whether you face any such issues.