Down with a throat infection, on-field umpire Richard Kettleborough pulled out of day three's play in the opening cricket Test between India and Sri Lanka in Kolkata on Saturday.
Kettleborough was replaced by West Indies' Joel Wilson, who accompanied Nigel Long to start the day's proceedings as India resumed on 74/5 at EdenGardens.
"Wilson is down with a throat infection and has been replaced by third umpire Wilson of the West Indies Cricket Board," a Cricket Association of Bengal official said.
Fourth umpire Anil Chaudhary has been made the TV umpire while Cricket Association of Bengal's Binod Thakur was inducted on board.
Only 32.5 overs could be bowled in the last two days due to rain.