Lawyer Rafik Chekkat, founder of the Islamophobia platform, said Maarifi was arrested in the morning at her home and taken into custody.
He criticised the arrest and said it took place at a time when French soldiers who fought in Gaza “enjoy total impunity.”
Thomas Portes, a lawmaker from the La France Insoumise, or France Unbowed (LFI) party, wrote that Maarifi has been released from custody.
“The search of the home in front of the family leaves no doubt about the desire to intimidate the voices that are raised to support the Palestinian people and demand an immediate ceasefire,” he wrote on X.
Maarifi attended pro-Palestinian rallies in France to share her testimony about the crippling situation in Gaza.