"Preventing free Tunisians from protesting on the revolution anniversary is shameful... and is an attack on freedoms and represents a big decline under the coup authorities," said Imed Khemiri, an Ennahda member of the suspended parliament.
In a statement, the party "strongly" condemned the use of power against peaceful protesters.
"Today Saied's only response to opponents is with force and the security forces... it is so sad to see Tunisia like a barracks on the date of our revolution," said Chayma Issa, an opposition activist.
What are the COVID restrictions in Tunisia?
On Thursday, Tunisian authorities brought in a string of measures to curb a steep rise in coronavirus infections.
The restrictions include a curfew from 10 p.m. to 5 a.m. local time. The presidency also ordered "the postponement or cancellation of all public gatherings or demonstrations, in closed or open spaces."
Opposition parties, including Ennahda, said the move was politically motivated and insisted on protesting on Friday.
After its third COVID wave last summer, Tunisia's daily COVID infections record had been in the low hundreds throughout December. But on Monday, the cases topped 4,800 a day.