The Microsoft’s Exchange Team released Rollup 10 for Exchange 2010 SP3 (KB 3049853) on June 16, 2015
This release provide minor improvements and fixes for customer reported issues. Update Rollup 10 is the last scheduled release for Exchange Server 2010. Exchange Server 2010 is in extended support and will receive security and time zone fixes on-demand on a go-forward basis.
Note: although RU10 is labeled as the last scheduled release for Exchange 2010, they indicate that a future update (RU11) will be required in order to support upgrading to Exchange 2016. But as no release date for Exchange 2016 has been announced, this information is subject to change.