Buckley has also been involved with Ireland at under-age international level. He was part of the Irish set up at school's and under-18 level. Although he was part of Allen Clarke's Ireland under-20 squads for both the Under-20 Six Nations and Junior World Cup in 2010, he never made an appearance for the side. At senior level, Buckley was selected for the Emerging Ireland squad to participate in the 2015 Tbilisi Cup, again coached by Clarke. He played in two of the team's three games as they won the tournament for the first time.