Vunivalu was brought in to the Wallabies training camp on 11 November 2020, less than a week after their two-point win over the All Blacks. Coach Dave Rennie stated, after speculation of Vunivalu's place in the Wallabies squad for the Tri Nations Series, that "there’s no plan to use Suli in the two Argentina games unless we have got a spate of injuries," adding, "the key for him is to earn the right to play and [we are] keen to reward the guys who have been working for the last three months."