Chris Gayle turned star performer with the ball with two wickets as the West Indies restricted Ireland to 129-6 in a crucial group B match at the World Twenty20 in Colombo on Monday.
The match, which sends the winners into the Super Eights round, was reduced to 19 overs per side after an hour's interruption due to rain.
Niall O'Brien made 25 and Gary Wilson scored 21, before both batsmen fell to Gayle's off-spin as Ireland lost wickets at regular intervals.
Irish captain William Porterfield was dismissed off the first ball of the match for the second time in a row, bowled by Fidel Edwards.
He had also fallen to Australian Shane Watson's first delivery in Ireland's previous match last week.
Paul Stirling and Ed Joyce carried the total to 33-1 when two wickets fell in the space of four runs.
Australia have already qualified for the next round from the group, having beaten both Ireland and the West Indies.