In July 2016 he was named in Sri Lanka's
Test squad for their
series against Australia, but he did not play. Fernando was included in Sri Lanka's
One Day International (ODI) squad for the series
against Zimbabwe. He made his ODI debut on 8 July 2017 at the
Mahinda Rajapaksa International Cricket Stadium in the fourth ODI against Zimbabwe, but did not able to take a wicket. He made his international debut for the
Sri Lanka cricket team in July 2017. In February 2018, he was named in Sri Lanka's
Twenty20 International (T20I) squad for their series
against Bangladesh, but he did not play. In May 2018, he was named in Sri Lanka's
Test squad for their series
against the West Indies. In December 2018, he was named in Sri Lanka team for the
2018 ACC Emerging Teams Asia Cup. In August 2019, he was named in a twenty-two man squad for Sri Lanka's Test series
against New Zealand. However, he was not named in the final fifteen-man squad for the first Test. In November 2019, he was named in Sri Lanka's squad for the
2019 ACC Emerging Teams Asia Cup in Bangladesh. Later the same month, he was named in Sri Lanka's squad for the
cricket tournament at the
2019 South Asian Games. The Sri Lanka team won the silver medal, after they lost to Bangladesh by seven wickets in the final. In December 2019, he was added to Sri Lanka's
Test squad for their tour to
Sri Lankan cricket team in Pakistan in 2019–20. He replaced
Suranga Lakmal, who was ruled out of the tour due to
dengue fever. In March 2020, he was added to Sri Lanka's
Twenty20 International (T20I) squad for the series
against the West Indies, replacing
Nuwan Pradeep. In December 2020, Fernando was named in Sri Lanka's Test squad for their series
against South Africa. He made his Test debut for Sri Lanka, against
South Africa, on 3 January 2021. In February 2021, Fernando was named in Sri Lanka's T20I squad for their series
against the West Indies. In July 2021, he was named in Sri Lanka's squad for their series
against India. In May 2022, in the second match of the series
against Bangladesh, Fernando took his first
five-wicket haul in Test cricket in second innings, with 6/51. He also took four wickets in first innings. In that process he took 10 for 141 from the match. This is his first 10-wicket haul. In August 2022, he was named in Sri Lanka's T20I squad for the
2022 Asia Cup. He made his T20I debut on 1 September 2022, against
Bangladesh. In May 2024, he was named as a reserve player in Sri Lanka’s squad for the
2024 ICC Men's T20 World Cup tournament. On August 30, 2024, second test match
against England at
Lords Asitha took his second five wicket haul (5/102) . He became only the second Sri Lankan bowler after
Rumesh Ratnayake to have his name in the
Lord’s Honours Board. Asitha describe this feat as dream come true for him. Due to his performance he reached 8th place in ICC test bowling rankings. Asitha became highest wicket taker in the series taking 17 wickets in 3 matches with average of 24.64 including one five wicket haul and one four wicket haul. On 18 June, 2025, first test match
against Bangladesh Asitha took four wicket haul. His first four wicket haul on home soil. ==References==