The global governing body tweeted the news, detailing that the captain was in breach of Level 2.2.9 of the ICC Code of Conduct for 'changing the condition of the ball - the same charge leveled at Australia batter Cameron Bancroft during the infamous Cape Town Test in March.
Play started two hours later in St Lucia, following lengthy discussions between match referee Javagal Srinath and Sri Lanka's coaching staff.
"The team management has informed us that Sri Lankan players have not engaged in any wrongdoing during the ongoing Test match played between Sri Lanka and West Indies", a statement from SLC said.
They penalised Sri Lanka before play on Saturday with a change of ball and the award of five runs to the West Indies.
Sri Lanka eventually took to the field at 10.50am local time - 50 minutes after the scheduled start - but there was a further delay of 40 minutes as, having taken to the field, Sri Lanka captain Dinesh Chandimal began arguing with the umpires before a delivery was bowled.
In a statement, Sri Lanka Cricket (SLC) solidly backed their players.
The Sri Lankan Biard ensured that they "will take all necessary steps to defend any player, in the event any unwarranted allegation is brought against any members of the team".
He lost the company of Chase in the final over the session as Sri Lanka struck immediately upon taking the second new ball when the all-rounder, on 41, flicked a full-length delivery to Suranga Lakmal at midwicket. If there are any, code of conduct charges will follow as per usual at close of play'.
Opening batsman Devon Smith top scored with a painstaking 61 while Shane Dowrich, fresh from a match-winning unbeaten century in the first Test in Trinidad, contributed 55. He was shining the ball and had bandages on like many players do.
Earlier, Australia's Cameron Bancroft, Sri Lanka's Dasun Shanaka (2017) and South Africa's Faf du Plessis (2016) were also held for the same charge.
That match was the only Test in the game's history to be forfeited after Pakistan refused to return to the field.
West Indies won the first test by 226 runs.
Bancroft was subsequently whacked with a nine-month ban from global and first-class cricket by Cricket Australia.