Sissoko (pictured) has joined Fiorentina, where he will spend the rest of the season - La Viola confirmed their have a right to sign the Malian permanently for a reported fee of €3.5 million.
Rabiot has made six appearances since signing for PSG, but he will now rejoin his former club Toulouse for the rest of the campaign.
"Personally, I want to have playing time to progress," he told the Toulouse website.
"I know I have qualities, but there is still much work to do."
The 17-year-old, who briefly joined Manchester City back in 2008, is a France U19 star.
Meanwhile, Bodmer has joined Saint-Etienne on loan for the rest of the season.