In 2018, Smith represented the Opals in her first major international tournament – the 2018 FIBA Women's Basketball World Cup, held in Tenerife, Spain. She averaged 14.4 minutes of court time for 6.3 points and 2.3 rebounds per game, with her best game yielding 10 points and 5 rebounds (vs Argentina). She also scored 10 points in the final vs USA.