Sito is not being offered a new contract by Ipswich Town.
The defender has been told he will be leaving the club when his current deal expires next month.
In addition to the Spaniard, Town have also confirmed - as expected - that they will not be offering new contracts to Fabian Wilnis and Sylvain Legwinski.
And boss Jim Magilton has said he will listen to offers for five of his fringe players - Gavin Williams, Billy Clarke, Dan Harding, Matt Richards and Gavin Roberts.
Meanwhile, Town are close to arranging two friendlies against Premier League opposition.
Two provisional dates have been put aside - Saturday, July 26 and Monday, August 4.
As part of their pre-season preparations, Town are also going on a tour of Northern Ireland.
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