Bangladesh were all out for 124 runs against Ireland in Friday's third and final Twenty20 international at Zahur Ahmed Chowdhury Stadium in Chittagong.
The Tigers had won the toss and elected to bat first.
But fall of regular wickets kept them under pressure from the beginning and they were eventually bowled out for a below-par total in 19.2 overs.
Shamim Hossain top-scored for Bangladesh with 51 off 44 balls with five fours and two sixes.
Mark Adair took three wickets for Ireland, while Matthew Humphreys took two.
