Lincoln boss Steve Tilson has vowed to monitor Delroy Facey's Grenada commitments after he missed three games while on international duty.
Facey, 30, who played in the Caribbean Cup qualifiers, could miss more Imps games if called up for the finals.
Tilson told BBC Lincolnshire: "Eighteen days away is too long.
"I think he may have gone away too early. I don't think he needed to be away when he was, so that's something I've got to look into."
The Caribbean Cup finals will be played in late November and early December.
Tilson added: "I'll certainly be making sure of the date he goes and the date when he's meant to come back."
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