In August 2016, Poole was promoted to the Wales Under-21 squad for the 2017 UEFA European Under-21 Championship matches against Denmark and Luxembourg in September 2016 in place of the injured Lee Evans. In May 2017, Poole was named in the Wales under-20 squad for the 2017 Toulon Tournament. He was named in the starting line-up in all three of Wales' group matches against the Ivory Coast, France and Bahrain as Wales were eliminated in the group stage.