Thursday's meeting at Clonmel has been abandoned due to the cold spell of weather.
Officials made the decision to call off the card early on Wednesday morning.
A statement from the Irish Horseracing Regulatory Board said: "The IHRB has announced that the fixture at Clonmel on Thursday, March 1 has been abandoned due to an adverse weather forecast and hazardous driving conditions."
Races at Dundalk, scheduled for Friday, have also been cancelled for the same reasons.
Dundalk cancelled on Friday, 2nd March due to adverse weather forecast and hazardous driving conditions.
— HRI_RÁS (@HRI_RAS) February 28, 2018
Navan, scheduled for a day's races on Saturday, is currently unfit for racing due to snowfall and is being monitored.