The 25-year-old striker has been uncapped for Team Melli for a variety of reasons but looks set to finally make his international bow after flying into the country
The Wolfsburg striker, who was raised in Berlin but born in Tehran, has long been linked with the Iran national team but remains uncapped after previously rejecting invitations and having injury and eligibility issues.
However, Dejagah has arrived in Iran ahead of Wednesday's clash with Qatar and will finally make his Team Melli bow.
"I am looking forward to this experience and will try to make the best out of it," Dejagah told reporters in Germany prior to flying to Iran.
The 25-year-old went on to bemoan his side's 2-1 loss to Hoffenheim prior to his journey.
"I rather would have gone after a home victory," he said.
However, he later added he was relieved to finally be making his Iran debut, saying: "Nevertheless, I am happy it finally worked out.
Iran meet Qatar on Wednesday in the third round of World Cup qualifying through Asia, although Team Melli have already secured their passage into the next phase.