5,000 jobs will be lost in Donegal as a result of the new restrictions, according to the Restaurants Association of Ireland.
Chief executive Adrian Cummins says hundreds of restaurants, hotels, cafes and pubs will close.
But Agriculture Minister and Donegal TD Charlie McConalogue says the measures are necessary:
A Donegal restaurateur says making money from takeaways won't be an option for her.
Restaurants and bars in the county have been told to close their dining rooms from midnight tonight.
They may only serve up to 15 people at a time outdoors.
Emily Browne, owner of the Smuggler's Creek in Rossnowlagh, says she's closing her doors, probably until next spring: