 In January 2013 he was selected in the 35 man Wales squad for the 2013 Six Nations championship.Coombs made his international debut for Wales as a lock forward in their first match of the 2013 Six Nations Championship against Ireland in the Millennium Stadium on 2 February 2013.In May 2013 he was selected in the Wales national rugby union team 32 man training squad for the summer 2013 tour to Japan.