The Daily Mail says the 18-year-old, who hasn't featured for his adopted nation since a 6-0 hammering by England Under-21s in Sheffield last August, withdrew with a mystery injury - despite starring in last week's Under-21 Premier League Final win over Manchester United at Old Trafford.
As SFA chief executive, Gordon Smith helped Feruz qualify for Scotland and told the Daily Mail: "People have to be fired up and want to play for their country, to feel pride in the jersey - to feel like they belong to the country and have a stake in its success.
"If you've got someone - like Islam Feruz - who doesn't want to play for Scotland, the only option is to reject him immediately. If he cannot commit to playing for this country, we shouldn't have anything to do with him.
"I don't know what he is thinking now because, under the rules, he cannot play for any other Home Nation, so it's not as if he can play for England."
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