The selectors have opted to retain the same squad that won the ODI series 2-0 last week, with chief selector Ann Browne-John saying the group has a strong balance of experience and youth.
"The selection panel decided to retain the players who completed the ODI series," Browne-John said. "These players have shown form and performance which enabled the team to secure a series win, which the team has been striving for in recent times.
"As we continue the rebuilding, we believe we have found a competent balance in mix of senior players and the younger players selected. It is in keeping with our ethos of preparing the next batch of West Indies women's players, by combining the experienced and the newly capped players."
All three games will be played in St Lucia's Daren Sammy Cricket Ground. The first fixture is on Tuesday, July 4, followed by matches on July 6 and 8.
West Indies T20I squad: Hayley Matthews (captain), Shemaine Campbelle (vice-captain), Aaliyah Alleyne, Shamilia Connell, Chinelle Henry, Afy Fletcher, Cherry Ann Fraser, Shabika Gajnabi, Zaida James, Djenaba Joseph, Qiana Joseph, Ashmini Munisar, Stafanie Taylor, Rashada Williams.