Donegal will enter level three Covid-19 restrictions from midnight tonight.
Businesses in the county were given a little more than 24 hours to prepare for the change.
It will be the same restrictions as are in Dublin - including a ban on indoor dining.
However, pubs that don't serve food will be allowed to open with outdoor service only.
Acting Chief Medical Officer, Ronan Glynn, says a high spread of Covid-19 in Derry has had an impact on Donegal:
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.