Reds boss Jose Mourinho was believed to be confident of sealing a deal for the 28-year-old, though that confidence will surely have been shaken after the former Borussia Dortmund man was snapped by photographers at Nanjing International Airport after being named in Lucianop Spaletti's squad.
Mourinho is believed to be desperate to bolster his United side further before the start of the new Premier League season, with Victor Lindelof and Romelu Lukaku the only new faces in his squad so far.
It it believed that the Portuguese was optimistic that terms would be agreed with Inter early enough to prevent Perisic from travelling East, though that was obviously not the case.
Any move will now have to wait until Inter return from their travels, with Mourinho said to be prepared to pay £44m for the 57-time Croatian international.
Inter's 28-man squad can been seen in full below.
Luciano #Spalletti has named a 28-man squad for the #InterSummerTour https://t.co/XwAqwdHf4y #InterIsComing #FCIM
— F.C. Internazionale (@Inter_en) 18 de julho de 2017