"I've made the decision to quit the international stage. It has been a very hard decision to make because I've been very proud and honoured to play for my country," the 31-year-old was quoted as saying on the Nancy website.
"But after having played for my national team for 12 years, I thought it was time to make way for young players," Ouaddou added.
Morocco failed to qualify for this year's World Cup in South Africa.
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