Malan was named in England's
Twenty20 International (T20I) squad for their
home series against South Africa in June 2017. He made 78 on his debut, on 25 June 2017, with England winning the match and Malan adjudged 'man of the match' for his batting performance. He was added to England's
Test squad, ahead of the third Test
against South Africa, and made his Test debut on 27 July 2017 as a number 5 batsman. In the first innings, he made 1 before being bowled out by a
yorker from
Kagiso Rabada; in the second innings he was dismissed for 10. He also failed to impress in his second Test, raising questions over his Test future. However, Malan kept his place for the series against
the West Indies and scored his maiden Test 50, helping England to win their first day-night Test. Malan was selected for the winter tours to Australia and New Zealand, during the
3rd Ashes Test at the
WACA in December 2017, Malan scored his first Test century: his 100 was the first century of the series from the England team. Malan continued his good form in T20Is on the tour, adding another three half-centuries in the four games he played in the
Trans-Tasman Tri-Series, though this was not enough to see him keep his place in the team once rested players were recalled during the following English summer. He did retain his place for the two Tests against Pakistan and the first Test against India that summer, but was dropped after a poor run of form. Malan was added to England's
One Day International (ODI) squad for their one-off match
against Ireland on 3 May 2019. He made 24 runs on his ODI debut for England in the match, as a number of their World Cup squad were rested. Malan was recalled to the T20I squad for
tour to New Zealand, and, on 8 November 2019 in the fourth T20I, Malan scored his first century. It was the second, and fastest, by an England batsman, coming from just 48 balls. He played in all six of England's T20Is against Pakistan and Australia in the summer of 2020, scoring 213 runs, with his performances moving him to first position in the
ICC T20I batter rankings in September 2020. His good form in the format continued on the
winter tour to South Africa, where two 'Player of the Match' performances of 55 and 99 not out in the second and third T20Is saw him reach the highest ever rating (915 points) in the ICC rankings. In March 2021, during
England's tour of India, Malan became the fastest batter to score
1,000 runs in T20Is in 24 innings. In August 2021, Malan was recalled for the third Test of the
2021 test series against India. Malan scored 70 in the first innings. The following month, Malan was named in England's squad for the
2021 ICC Men's T20 World Cup. In June 2022, in the opening match against the
Netherlands, Malan scored his first century in ODI cricket. He made 125 runs, as part of England's score of 498 runs, the highest team total in ODI history. Malan was one of three centurions in the innings, along with
Phil Salt and
Jos Buttler. Malan also became the third English player to score a century in all three formats after Heather Knight and Jos Buttler; he also took his maiden ODI wicket, becoming the first and only English male player to have scored a century and taken a wicket in all three formats. Later in the year, Malan was part of the winning England squad at the
2022 ICC Men's T20 World Cup. He scored a total of 56 runs in the group stage, but was injured in the final group game and missed the semi-final and final. He was announced as part of England's provisional 15 man squad for the
2023 Cricket World Cup. He scored 140 runs off just 107 balls in the second game against Bangladesh. Malan announced his retirement from international cricket on 28 August 2024. At the time, he had the fifth highest
batting average (55.76) in one-day cricket, and after
Kevin Pietersen, the second highest (36.38) amongst England players in T20 cricket. In the latter format, he was ranked the world's best player between September 2020 and November 2021, but struggled to gain public and media acceptance. Writing in
Wisden Cricket Monthly, however,
Laurence Booth commented that Malan deserved to be remembered for how "exhilarating he could be once he got into the groove". ==T20 franchise cricket==