Wiese made his T20I debut for
South Africa against
Sri Lanka on 2 August 2013. However, he was soon dropped from the national team and he was sent to play domestic cricket after modest returns in the three match T20I series against Sri Lanka. He made his
One Day International debut for South Africa
against New Zealand on 19 August 2015. He was included in the South African squad for the
2016 ICC World Twenty20 where South Africa were knocked out in the Super 10s. On 9 January 2017, Wiese signed a
Kolpak deal with Sussex which made him ineligible to represent South Africa anymore, ending his international career. In August 2021, head coach of the Namibian cricket team
Pierre de Bruyn confirmed that Wiese would be available to represent Namibia at the
2021 ICC Men's T20 World Cup. In September 2021, Wiese was named in Namibia's squad for the T20 World Cup tournament. He was also named in Namibia's T20I squad for the
2021 Summer T20 Bash, played just before the World Cup. He made his T20I debut on 5 October 2021, for Namibia against the
United Arab Emirates. He was part of the Namibian team that won their first ever match at an ICC tournament when they defeated the Netherlands by 6 wickets during the 2021 ICC Men's T20 World Cup in
Abu Dhabi on 20 October 2021. Wiese scored an unbeaten 66 off 40 balls and took 1/32 in 4 overs in a man-of-the-match performance. He was a key member of the Namibian outfit which reached Super 12 stage in their historic campaign at the 2021 ICC World Twenty20 competition. He ended the tournament on a high note with an all-round display scoring 227 runs at a healthy decent batting average of 45.40 and picking up 6 wickets in 8 matches. He was nominated for the
ICC Player of the Month along with
Shakib Al Hasan and
Asif Ali for the month of October 2021. In March 2022, he was named in Namibia's ODI squad for the
2022 United Arab Emirates Tri-Nation Series. He made his ODI debut on 6 March 2022, for Namibia against
Oman. After previously playing six ODIs for South Africa, Wiese became the 15th cricketer to
represent two international teams in ODIs. In May 2024, he was named in Namibia’s squad for the
2024 ICC Men's T20 World Cup tournament. On 15 June 2024, he announced his retirement from international cricket following Namibia's last group stage fixture against defending champions England on 15 June 2024 at the 2024 ICC Men's T20 World Cup, where he played a crucial innings of 27 runs in only 12 balls in a tricky run chase. ==Notes==