Mount Maunganui: The third and final T20 international between New Zealand and the West Indies was rained off on Monday, giving the Black Caps a 2-0 series win.
Only 2.2 overs were bowled at Mount Maunganui before a downpour forced players from the field, with the West Indies on 25 for one after losing the toss and being asked to bat.
The umpires finally called off the fixture two hours later with no sign of a break in the weather.
New Zealand won the first T20I by five wickets and the second by 72 runs against a West Indies outfit that only emerged from COVID-19 quarantine on Thursday.
Paceman Lockie Ferguson was named Man of the Series after taking five for 21 in the opening fixture, plus one wicket apiece in the second and third matches.
The first of two Tests between the sides begins in Hamilton on Thursday.
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Williamson was non-committal about his availability for the Black Caps' remaining Tests this month with his partner Sarah Raheem due to give birth to their first child.
Kane Williamson is ranked the second-best Test batsman in the world behind Australian Steve Smith and equal with India's Virat Kohli.
Pace bowler Roach is returning home following the death of his father last week while wicketkeeper Dowrich continues to be troubled by the hand injury that sidelined him after day one of the first Test.