In a game that was hampered by weather in Port of Spain, India swept West Indies with a commanding 119-run victory with to half centuries from openers Shubman Gill and Shikhar Dhawan.
There were numerous delays throughout India's innings, which resulted in the visitors having to start their innings after the game had been originally limited to 40 overs per side due to bad weather.
India's innings was concluded even sooner after yet another rain delay at the conclusion of the 36th over, with the visitors scoring a respectable score of 225/3 from their allotted overs.
Shikhar Dhawan (58), who scored his second series-high half-century, and opener Shubman Gill (98*), both stood out with career-best scores.
During the tour, the young right-hander amassed two half-centuries and 205 runs from just three hits, winning him the Player of the Match and Player of the Series awards.
During the three-match series, Shreyas Iyer, Axar Patel, Shardul Thakur, and Yuzvendra Chahal all displayed potential, demonstrating that India is laying a solid foundation for their white-ball teams.
Wednesday's West Indies run chase began with two wickets from seasoned pacer Mohammed Siraj, and was completed by Chahal, who finished the job with four scalps of his own during an outstanding session.
West Indies' performance in 50-over cricket has been fairly bad lately; the Caribbean team is currently on a losing run of nine games following straight series defeats to Pakistan, Bangladesh, and now India.
While the first two games of the series versus India included many encouraging indicators, the third and final game was entirely lopsided as the hosts were unable to compete with their opponents.
Hayden Walsh, a spinner, claimed two wickets but also let up 57 runs in his 10 overs as the West Indies top order struggled to deal with India's new-ball bowling attack.
In this game, captain Nicholas Pooran and right-hander Brandon King both scored 42 runs, but there were many mistakes as Phil Simmons' team's disastrous series came to an end.
Brief Scores: India 225/3 in 36 overs (Gill 98 not out, Dhawan 58; Walsh 2-57) beat West Indies 137 in 26 overs (Pooran 42, King 42; Chahal 4-17, Siraj 2-14) by 119 runs (DLS)