New Zealand opener Finn Allen smashed 71 off 29 deliveries to help the hosts thrash Bangladesh by 65 runs in the rain-shortened third T20I on Thursday to complete a 3-0 sweep of the series.

Allen hit 10 fours and three sixes in his knock to help New Zealand put on a total of 141 for four after wet weather forced the match at Auckland to be reduced to 10 overs per side.

Allen, who only two matches ago made a golden duck on debut, raced to a half-century from 18 balls — the second-fastest by a New Zealander in T20 Internationals.

Bangladesh didn’t seriously challenge and were bowled out for 76 in 9.3 overs.

Leg-spinner Todd Astle, playing only his fourth T20I for New Zealand since 2016 and his first in almost 18 months, took 4/13 from the two overs he was allowed.

In the reduced match, bowlers were permitted two overs each and the Powerplays were only three overs.

“It was good fun,” Allen said. “We wanted to give ourselves a bit of a chance at the start and take it from there. I just tried to look at it as another game of cricket, stick to my processes and keep watching the ball, trying to hit it hard as I’ve tried to do all season.”

Brief scores: New Zealand 141/4 in 10 overs (F. Allen 71); Bangladesh 76 all out in 9.3 overs (T. Astle 4/13, T. Southee 3/15).

NZ won by 65 runs.