Closure orders were served in Dublin on Food Revolution Restaurant, Moore St, and Aya Corporation Ltd, Lower Erne St.
Giovannis Fast Food on Pearse St, Clonakilty, Co Cork, was also shut down as a grave and immediate danger to public health.
De Mussel Man Food Stall at Ardnagashel, Bantry, Co Cork, was served with a prohibition order, indicating the operation was a serious risk to public health.
FSAI chief executive Dr John O’Brien said the orders were “four too many”.
“It is concerning as the summer season approaches where, due to warmer overall temperatures, we see a marked increase in food-borne disease trends.
“Every enforcement order undermines consumer confidence ... which affects not only the premises involved, but the industry as a whole,” Dr O’Brien said.