The 26-year-old all-rounder fell foul of the ICC's code of conduct during Saturday's second day when, in the 101st over of the West Indies' first innings, he "reacted in frustration after being edged by Shai Hope for a boundary by making an inappropriate comment which was clearly audible through the stump mic and also heard by the match officials," according to an ICC statement.
Stokes admitted he had used "obscene" language and accepted the sanction proposed by ICC match referee David Boon, the former Australia batsman.
If he reaches four or more demerit points within a 24- month period, they will be converted into suspension points and he will receive an international ban.
Two suspension points equate to a ban from one Test or two one-day internationals or two Twenty20 internationals, whatever comes first for the player.
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