The 30-year-old made one appearance for Vale, in their 2-1 defeat by Carlisle in the EFL Cup first round on 9 August.
"Having moved to England from Portugal over the summer, the striker has found it difficult to adjust to life in the country," a club statement said.
The former Sporting Lisbon player will now return to Portugal.

The South Africa-born 30-year-old claimed 6-66 on his debut against Nottinghamshire at Old Trafford.
Wagner, who had a stint with Northants in 2014, joined the Red Rose as their overseas player for the 2016 campaign.
"It's a great club and a great place. I always had something for Lancashire when I played here for Ormskirk in 2008," he told BBC Radio Lancashire.
"I came to watch quite a few games for Lancashire and when England played here as well, so I love the ground and everything about it.
"For me to come over here was an easy decision and to come and play a part in such a special club is pretty awesome. I'm lucky to be here."
Wagner's figures were the best by a bowler making his Lancashire first-class debut since 1923.

The authorities in Argentina, Chile, Colombia and Spain carried out the arrests and seized 250 items of IT equipment and mobile phones, Interpol says.
Those arrested are aged between 17 and 40.
The operation follows cyber attacks on Colombian and Chilean websites.
Interpol says the websites of the Colombian Ministry of Defence and the presidency, Chile's national library, and the Chilean electricity company Endesa were attacked.
Spanish authorities say four people were arrested as part of the operation in Spain, in Madrid and Malaga.
Two of them remain in custody, while the other two, including a minor, were released on bail.
Spain's interior ministry said that one of the four arrested was the alleged manager of Anonymous' computer operations in Spain and Latin America.
Anonymous is a loose international network of online activists which describes itself as an "internet gathering". Its protests often take the form of disrupting websites and services.
Many Anonymous protests tackle issues of free speech and preserving the openness of the net.
Port Vale have terminated the contract of Portuguese striker Carlos Saleiro, just six weeks after he signed for the League One club.
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New Zealand seamer Neil Wagner has spoken of his pride at being able to play for Lancashire this season.
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Police in Latin America and Europe have arrested 25 suspected members of the Anonymous hacking group, according to Interpol.