[8][9] In March 2019, he was named as one of eight players to watch by the International Cricket Council (ICC) ahead of the 2019 Indian Premier League tournament.
[17] He made his (T20I) debut for the West Indies against India on 4 November 2018, taking the wickets of Rohit Sharma and Shikhar Dhawan.
[18] In January 2019, he was named in the West Indies' Test squad for their series against England as a cover for Alzarri Joseph, but he did not play.
[25] In June 2020, Thomas was named as one of eleven reserve players in the West Indies' Test squad, for their series against England.
[26] The Test series was originally scheduled to start in May 2020, but was moved back to July 2020 due to the COVID-19 pandemic.