Anusha also selected to represent Sri Lanka at the 2018 Commonwealth Games which was also her maiden Commonwealth Games appearance at the age of 39 and competed in the boxing events. She started the tournament well with reaching the semi final round and was scheduled to face her arch-rival Mery Kom who is 35 years old in the semifinal again after the 2016 South Asian Games final. With reaching the semi final stage, Anusha became the first Sri Lankan female boxer ever to qualify for the semi final round in a boxing event at the Commonwealth Games. During the semi final clash on April 11, Mery Kom managed to beat Anusha Koddithuwakku comfortably 5-0 to secure a final round berth. After losing the semifinal, Anusha was awarded the bronze medal which was also Sri Lanka's 4th medal at the 2018 Commonwealth Games. This was also the first ever medal received by a Sri Lankan in boxing at the history of Commonwealth Games after 68 years since Albert Perera's gold medal achievement at the 1950 Commonwealth Games. She too became the first Sri Lankan woman boxer to clinch a Commonwealth Games medal in boxing.