Pakistan women's team suffered defeat to West Indies by five runs in the third T20I to take 3-0 lead in the five-match series at National Bank Stadium on Tuesday.
The hosts were in line to chase 133-run target to win their first game of the series but suffered a massive collapse in the last overs.
The home side made a rapid start to the run chase, with opener Sidra Ameen hitting boundaries briskly.
She forged a dominant 64-run partnership with Ayesha Zafar, who departed in the ninth over after a gritty 19 off 22 deliveries.
Sidra then formed brief partnerships with Muneeba Ali (12) and skipper Nida Dar (17) before eventually falling in the 18th over.
She emerged as Pakistan's top-scorer with a solid 63 off 58 deliveries, including seven boundaries.
Her dismissal triggered a massive collapse in the lower order as Pakistan lost four more wickets rapidly which allowed West Indies to stage a remarkable comeback.
The home side required 12 runs from the final over, but Shamilia Connell showed nerves of steel to guide West Indies to victory despite conceding a boundary off the last delivery.
Earlier, in-form West Indies captain Hayley Matthews scored consecutive half-centuries and propelled her side to a formidable total.
Put into bat first, the visitors amassed 132/5 in the allotted 20 overs despite a cautious start.
West Indies’ new opening pair of Rashada Williams (1) and Hayley Matthews did not prove fruitful for the visiting side as the former struggled against a disciplined bowling attack before falling victim to Fatima Sana in the fourth over.
In-form Matthews was then joined by Shermaine Campbelle, and the duo launched an impressive recovery.
The pair added 89 runs for the second wicket, with Hayley Matthews leading the charge and securing her second consecutive half-century in the process.
She struck 10 boundaries on her way to a 49-ball 68 before being dismissed by Tuba Hassan in the 16th over.
Fatima Sana spearheaded the bowling attack for Pakistan women with two wickets, while Tuba and Dar contributed with a wicket each.