The Serie A champions have paid €5 million for the midfielder for his remaining 50 per cent stake and will allow the experienced defender to move in the other direction
Marrone spent last season at the Neroverdi on a co-ownership agreement but will now return to Juve after the Serie A champions bought the remaining 50 per cent of his transfer rights.
The 24-year-old has signed a five-year deal with the Bianconeri, with Juventus paying Sassuolo €5 million over the course of three years to acquire the midfielder's signature.
Peluso, meanwhile, has agreed a permanent deal to move to the Citta del Tricolore for a total fee of €4.5m.
"Juventus Football Club and U.S. Sassuolo Calcio have today reached an agreement on two transfer deals concerning Luca Marrone and Federico Peluso," a statement on Juve's official website read.
"Marrone, who spent last season on a co-ownership agreement with the Neroverdi, will return to Juventus after the club paid a €5 million fee for the remaining 50 per cent of his transfer rights. He has signed a five-year contract.
"Peluso, meanwhile, will join Sassuolo on a permanent basis after both clubs agreed a €4.5m fee payable over three years for the defender's services."