It was meant to kick off at 17.30 GMT (18.30 local time) at the Dacia Arena in Udine.
The squad had been ordered not to travel with a regular airline on Monday after one positive COVID-19 test within the group of players.
More tests were ordered, with the plan to travel with a private plane on Tuesday morning.
However, it seems that as more of these have come back positive, along with some members of staff, the ASL (local health authority) in Salerno has ordered the entire matchday group into lockdown.
That means they cannot travel, train or play for the next few days, including this game.
Salernitana confirmed via a statement late Monday night that they have been banned from participating in sporting activity.
The ASL over-rules the Lega Serie A COVID protocol, so the game cannot go ahead.
It is the third match in Italy to be postponed this week after two Serie B fixtures, Benevento-Monza and Lecce-Vicenza, were called off due to COVID outbreaks.