The Argentine attacker has been on the fringes of the action at San Siro and he looks resigned to leaving the Nerazzurri at the end of the season
The 25 year old moved to San Siro on a season-long loan on the last day of the summer transfer window, with a view to a permanent deal at the end of the campaign.
However, Zarate has failed to impose himself at Inter, and the feeling in Italy is that the Nerazzurri will not exercise their buying option for the player, who has only made six appearances since the start of the calendar year.
As Italian reports suggest that Zarate has been left out of Inter's match squad for Sunday's crunch game at Juventus, the Argentine has vented his frustration on social networking website Twitter.
"There is not much left because it is all over here," Zarate wrote.
Zarate signed for Lazio from Al Sadd in 2009 in a €20 million deal after a season on loan at the Stadio Olimpico.