Ulster's trip to play Zebre on Friday has been postponed following the death of their player Nevin Spence in a farm accident.
The game in Parma will now be played at a later date, while a moment of silence will also be observed at all RaboDirect PRO12 matches this coming weekend.
A book of condolence has been opened at Ulster Rugby's Ravenhill ground in Belfast, already the site of floral tributes.
Ulster centre Spence, who was 22, died in an accident at his family's farm on Saturday - along with his father Noel and elder brother Graham.
Spence's sister Emma, who survived the slurry pit tragedy, has been released from Belfast's Royal Victoria Hospital after being treated for the effects of inhaling fumes.