Souness was given a trial for with New Zealand, in 2015, but then suffered her ACL injury. She was finally selected for the team in 2017, playing her first match, against South Africa, in August of that year, and being the 167th woman to play for the national team. By the end of 2021 she had played 14 games, in the wing attack (WA) and centre (C) positions. Souness was a member of the Silver Ferns 2022 Commonwealth Games Team that won Bronze after defeating England.
