The 23-year-old left-hander stroked a responsible 61 as West Indies, sent in to bat at the Windward Cricket Club, finished on 168 for seven after rain disrupted the innings and forced a reduction in overs to 40.
Daley then returned to make key strikes and finish with three for 25 from eight overs of left-arm seam, to send Sri Lanka tumbling to 131 all out in search of a revised 177 for victory, with eight balls left in the innings.
West Indies clinched the series 2-1 after winning the opening game at Kensington Oval by 88 runs last Wednesday and losing the first of the doubleheader at Windward by a wicket on Friday.
