Inter is keen to lure Vucinic from the Serie A champions and could send Guarin in the other direction as part of the deal.
Inter coach Walter Mazzarri is keen to add some more firepower to his squad and the Giuseppe Meazza side has targeted the 30-year-old Vucinic. The Montenegro striker was previously linked to the Premier League as his agent Alessandro Lucci traveled to London for talks with Arsenal.
However, the Premier League side was only considering a loan move, while Juventus wants to sell Vucinic outright, thus opening the door for Inter.
The forward is believed to have said goodbye to his teammates at the Vinovo, the Bianconeri's training ground, ahead of a probable switch to the fifth-place Serie A side.
The Nerazzurri are in advanced talks with the Serie A champions and will continue talks later Monday to discuss the inclusion of Guarin.
The Colombia international, 27, is keen to leave Inter after falling out with the club's board of directors and had previously caught the attention of Chelsea. A move to Jose Mourinho's side eventually fell through, but he could now continue his career at Juventus instead as both sides are nearing an agreement.