[citation needed] He made his first-class debut on 13 March 2020, for Colts Cricket Club in the 2019–20 Premier League Tournament.
[6] In November 2021, he was selected to play for the Galle Gladiators following the players' draft for the 2021 Lanka Premier League.
[11] In February 2021, Madushanka was named in Sri Lanka's limited overs squad for their series against the West Indies.
[19] Madushanka made a promising start to his international career, especially in the match against India, where he dismantled Indian top order by swinging the ball into the right-hand batters, and flattened the stumps twice including knocking two of Virat Kohli's out of the ground and then Deepak Hooda.
[22] At the World Cup 2023, Madushanka took a total of 21 wickets over 9 matches at an average of 25.00, and had his first ODI five-wicket haul of 5/80 against India on 2nd Nov 2023 held at Wankhede Stadium, Mumbai.