[6] In October 2020, he was drafted by the Colombo Kings for the inaugural edition of the Lanka Premier League.
[17] He did not play in any matches, and ahead of the third and final Test of the series, he was sent home due to conduct issues.
[21] On 23 June 2018, Vandersay was sent home by Sri Lanka Cricket (SLC) after a breach of his player contract regarding disciplinary issues.
[33] On his comeback return to Sri Lankan side, he made early inroads by deploying sublime wicket-to-wicket lines to trouble the Indian batting order on a slow surface favoring spinning conditions during the second ODI of the series and he eventually claimed his maiden five-wicket haul in ODI cricket with a match-winning spell of 6 for 33 runs in his full quota of ten overs to dismantle India for 208 runs inside 43 overs and his bowling heroics also propelled Sri Lanka to win by a margin of 32 runs to claim an unassailable 1-0 lead over India with a match to spare.
[34][35][36][37] He claimed the important wickets of Rohit Sharma, Shubman Gill, Virat Kohli, Shivam Dube, Shreyas Iyer and KL Rahul during his way to complete a six-wicket haul in an effort to defend 240 runs and he also received a player of the match award.
[38][39] He ended up the three-match ODI series as the leading wicket-taker among the two teams with a tally of eight wickets and his bowling exploits eventually helped Sri Lanka to win the ODI series 2-0 while it also marked first bilateral ODI-series win in 27 years for Sri Lanka against India since 1997.
He conceded 182 runs during the marathon spell of 38 overs with a slightly expensive economy rate of 4.79 and picked up three wickets which included priced scalps of Marnus Labuschagne, Steve Smith and Beau Webster.
[42] He scored his maiden half-century in test cricket when he smashed a quickfire swashbuckling 53 runs off 47 deliveries during Sri Lanka's follow-on reply to Australia's grand first innings scorecard of 654/6, with an impressive strike rate of 112.77 and the innings included a flurry of boundaries including seven fours and two sixes.
He also became the first Sri Lankan batter batting at number nine or lower to score an half-century in an innings of a test match against Australia.