Donnarumma announced his intention not to sign a renewal at Milan, with his contract due to expire in 2018, though the 18-year-old is due to meet the Serie A club to hold discussions on his future.
A string of social media messages, prompting Donnarumma – seen as the heir apparent to Buffon in the Italy team – to delete his Instagram account, and comments from agent Mino Raiola has added fuel to the ongoing saga in Milan.
"I don't give advice, because I always made my own mistakes and would only be adding further chaos to the situation," Buffon said via Sky Sport Italia .
"I did have a bit of a 15-minute chat with Gigio, though. I can't tell you what we said.
"I have no idea if he'll remain at Milan, but I merely tell him to do what makes him happy."
Donnarumma, who made his debut as a 16-year-old, has become Milan's undisputed number one, playing in all 38 Serie A matches last season.