The Barcelona star has come under regular fire for his performances on the field and his support off the pitch for his pro-Catalan stance.
"The World Cup in Russia is going to be my last tournament with the national team and I hope to take a lot of pleasure from these last two years," he said after Sunday's 2-0 qualifying win against Albania.
"This is not a decision that I have taken today, I have been thinking about it. But the criticisms today have added to what has happened over the last few years. There are also people who believe that it's better that I am not here," added Pique who will be 31 when the 2018 World Cup takes place.
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