Connacht are the second Irish province to have a PRO14 fixture postponed this weekend after Saturday's clash with Ospreys at the Sportsground was called off.
The game has been postponed due to a positive Covid-19 case among the Welsh side's squad.
Leinster also saw their fixture against Welsh opposition postponed yesterday after a number of Scarlets players tested positive for the virus.
The league say they will aim to reschedule both games for early next year.
"The game was due to take place on Saturday, November 28 in Galway, however, one Ospreys player has returned a positive case of Covid-19 and others identified as close contacts are now isolating," PRO14 chiefs announced in a statement.
"Having considered all the available evidence, the PRO14 Rugby Medical Advisory Group has deemed that this fixture cannot go ahead.
"Benetton Rugby, who played against Ospreys on Sunday, carried out routine squad testing this week and returned negative results all round.
"PRO14 Rugby will examine potential dates in early 2021 to reschedule the game."
