Cuadrado moved to Stamford Bridge in a 35 million euro ($34.9 million) deal only six months ago, but it now seems the Colombian international has been offered to Juventus until the end of the season after failing to impress Blues coach Jose Mourinho.
Juventus have been looking to bolster their attacking midfield since the departure of Arturo Vidal (Bayern Munich) and Andrea Pirlo (New York City FC) and amid the ongoing injury absence of Sami Khedira.
Marotta said the Turin giants had pounced on the offer, which is expected to become official on Monday, when the club unveil another new signing, Brazilian defender Alex Sandro.
"Today a great opportunity has come up, but we'll wait for tomorrow for the deal to become official," Marotta told Premium Sport.
"He will come on a loan deal. Six months ago Cuadrado was the subject of a €35 million transfer: today this opportunity came up, and we took it.
"Now, it's up to (Juventus coach, Massimiliano) Allegri to see where he fits in with the team."
The Gazzetta dello Sport website on Sunday said it would cost Juventus €25 million ($28.4m) to buy Cuadrado outright.
Juventus have won the past four Serie A titles and in his first season in charge, Allegri secured the league and Cup double and steered the Bianconeri to the Champions League final only to be outplayed by Barcelona.