In May 2017, Whitcomb applied for Australian citizenship. She qualified after meeting the criteria of living in Australia for at least four years and being a permanent resident for at least 12 months. But the process had stalled by June because of the challenges associated with applying from overseas. In December 2017, she was added to the Australian Opals squad ahead of the 2018 Commonwealth Games, with her Australian citizenship application approval imminent. On February 1, 2018, Whitcomb was naturalized at a ceremony in Perth before flying to Italy the next day for the Opals' training camp. She ultimately missed out on making the final squad. In September 2018, she was added to the Opals squad for the 2018 FIBA Women's Basketball World Cup, replacing the injured Leilani Mitchell. She won a World Cup silver medal with the Opals. In June 2019, she was selected to the Opals' Asia Cup training squad.