The game scheduled for Saturday afternoon is to be played Sunday at 4 p.m. ET.
Forecasts predict 15 centimetres of snow to fall on Saturday. Due to the instability of stadium dome, which is in need of replacement or repair, events cannot be held there if more than three centimetres of snow is forecast. The decision on whether it can go ahead is made 24 hours in advance.
The Impact's first three regular season games are to be played at the Big O, including matches April 5 against the New York Red Bulls and April 12 against the Chicago Fire.
There are also two Toronto Blue Jays pre-season baseball games slated for the stadium next week.