Regmi entered the Nepalese cricketing arena as a left-arm fast bowler with a reputation for swinging the ball both ways.
[3] Born in Bhairahawa in 1986, Regmi first represented Nepal at Under-17 level, playing in the ICC Under-17 Asia Cup in Pakistan in July 2000.
[7] Making his Under-19 youth ODI debut in the match, he didn't bat or bowl during the 48 run win.
Selectors did not lose their faith in him and he again featured for Nepal in the 2006 ICC Under-19 Cricket World Cup in Sri Lanka.
In the plate final against New Zealand he scored 66 runs and took 3 wickets and won Man of the match award.
[12] Later in 2006, he made his debut for the senior Nepali side, playing in an ICC Intercontinental Cup play-off match against Namibia.
[31] He took 8 wickets in the 2015 ICC World Twenty20 Qualifier at an average of 13.75 and an economy rate of 6.40,[33] including a four-wicket haul against Hong Kong,[34] which is the best bowling figures of a Nepalese bowler in the T20I format.
[40] In October 2018, he was named in Nepal's squad in the Eastern sub-region group for the 2018–19 ICC World Twenty20 Asia Qualifier tournament.
[41] In June 2019, he was named in Nepal's squad for the Regional Finals of the 2018–19 ICC T20 World Cup Asia Qualifier tournament.
[44] In June 2021, he was selected to take part in the Minor League Cricket tournament in the United States following the players' draft.
He was inspired by Daniel Vettori and Ashley Giles, and tried to imitate them, watching several highlights to try and learn how to get a batsman out as a spinner.