The German ambassador to Iran has left the country following the execution of German-Iranian dual national Jamshid Sharmahd, the German Foreign Office announced on Wednesday. The Foreign Office had summoned Markus Potzel to Berlin on Tuesday “for consultations” to protest “in the strongest terms” Sharmahd’s execution. “We will see how long these last,” said a ministry spokesman, reiterating that Iran knew that it had to expect “prompt action.” The spokesman said the “murder” of a German citizen was “extremely straining” on relations with Iran, which had already been reduced to a minimum. The F…