The event will be held on July 29, Sunday at the iconic Lord’s Cricket Ground.
Hetmyer has been ruled out of the side following illness prior to the start of the third Test.
If any of the three plead not guilty, then the ICC will appoint a Judicial Commissioner from its Code of Conduct Commission to determine the matter.
Chandimal will now miss the day/night Barbados Test, starting from Saturday, 23 June.
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Chandimal has completely denied the charges hurled at him.
Video evidence will be used in the hearing, which will also be attended by the match officials as well as members of the Sri Lanka team management.
The first match will be played on July 29 at the Rangiri Dambulla International Stadium in Dambulla.