Bello has represented the United States at both the under-15 and under-17 level. He was part of the under-15 squad that won the Torneo Delle Nazioni in 2017. The United States won every match in which Bello started. On October 10, 2019, Bello was named in the under-17 squad for the FIFA U-17 World Cup. He started and featured in two out of three matches as the United States were eliminated in the group stage.