ISTANBUL — Turkey on Thursday criticized a United States jury’s decision to convict a Turkish banker on charges of conspiring to evade American sanctions against Iran, calling the verdict “unjust” and the trial an “unprecedented interference” in its internal affairs.

Yet the sanctions-evasion scandal, in which ministers and even President Recep Tayyip Erdogan were linked to a billion-dollar gold-for-oil trade to help Iran evade American sanctions, appears to have passed in Turkey. The official comments had an air of repetition, and the reaction on social media was muted.

The banker, Mehmet Hakan Atilla, was found guilty on five of six counts, including bank fraud and conspiracies to defraud the United States and violate American sanctions. Mr. Atilla’s employer, Halkbank, said that he would appeal the decision, and noted that it had not been indicted or involved in the court proceedings.

Political analysts predicted that the affair would blow over because Mr. Erdogan had not been indicted or badly hurt by new evidence revealed at the trial. The government had successfully framed the case as a plot by its enemies, they said, so the verdict came as no surprise.