The match was halted for nearly 70 minutes with Pakistan's total on 260-6 after 44.3 overs. Under the Duckworth-Lewis method the West Indies were set 287 to win.
Babar Azam scored a 131-ball 120 and added 82 for the second wicket with Sharjeel Khan (54) and 99 with Sarfraz Ahmed (35) for the fourth wicket after Pakistan were sent into bat by the West Indies.
Paceman Carlos Brathwaite finished with 3-54.