Windies Women lose third T20I by five wickets; New Zealand takes series 2-1
Matthews, having opened the innings, was the leading scorer for the West Indies with 30 that were restricted to 93-9 from their 20 overs.
Shakibi Gajnabi contributed 19 while Kyshona Knight scored 16 and Chinelle Henry, 13, but the West Indies Women were unable to get the score beyond 100 in another abject performance with the bat.
Fran Jonas was the leading wicket-taker for New Zealand with 3-16. Suzie Bates 2-5 and Eden Carson 2-14 also played key roles in helping to restrict the home team.
Needing 94 for victory, Matthews tormented the batters while taking the first four New Zealand wickets with just 20 runs on the board. However, Moddy Green scored an unbeaten 49 and with Lauren Down put together a 38-run fifth-wicket stand that got New Zealand back on course.
Down was eventually dismissed by Afy Fletcher for 15, leaving Green and Hayley Jensen to take New Zealand to 94-5 and victory with eight balls to spare.
Jensen remained not out on eight at the end.
Matthews ended with 4-12 while Fletcher finished with figures of 1-12.