De Rossi, a former Roma captain, was hired in January to replace the fired Jose Mourinho and impressed so much during the second half of last season that he was given a contract extension in June through 2026-27.
"The club's decision is made in the best interests of the team, to get back on the desired path as soon as possible at a time when the season is still in its early stages," Roma said.Â
"A heartfelt thank you to Daniele, who will always be at home at the Giallorossi club, for the work done in recent months with passion and dedication."
Roma added that "communication regarding the team's technical guidance will follow."
Roma host Serie A leaders Udinese on Sunday.
After opening with a scoreless draw at Cagliari, Roma were beaten 2-1 at home by Empoli. Draws at Juventus (0-0) and Genoa (1-1) followed - leaving Roma with only three points and in 16th place.
De Rossi had transformed Roma into a better attacking unit than Mourinho's defensive teams but this season has produced only two goals.
Next week, Roma opens their Europa League campaign against Athletic Bilbao at the Stadio Olimpico.
Romelu Lukaku's loan spell at Roma ended after last season but talented striker Paulo Dybala stayed with the club after considering a move to Saudi Arabia.
Roma's American owners Dan and Ryan Friedkin have often made surprising decisions.
7°C