Vialli steps away from Italy duties for health reasons
"At the end of a long and difficult negotiation with my wonderful team of oncologists, I have decided to suspend, hopefully temporarily, my present and future professional commitments," said Vialli, head of delegation of the Azzurri.
"The goal is to use all my energies to help my body overcome this phase of the disease, so as to be able to face new adventures as soon as possible and share them with all of you."
Vialli, who enjoyed a stellar career with Sampdoria, Juventus and Chelsea and earned 59 caps for Italy, was first diagnosed with pancreatic cancer in 2017 but was given the all-clear a year later. A year ago he announced it had returned.
Italian Football Federation president Gabriele Gravina said Vialli could count on 'all of us'.
"Gianluca is an absolute protagonist of the Italian national team and will be in the future," Gravina said in a statement.
"Thanks to his extraordinary fortitude, the Azzurri and the affection of the entire federal family, I am convinced he will return soon. He can count on each of us, because we are a team, on and off the pitch."
European champions Italy, who failed to qualify for the World Cup, begin their Euro 2024 qualification campaign in March against England.