He was rushed to hospital after suffering a concussion in the match against England after colliding with his teammate Majid Hosseini.
He suffered a bloody nose as he tried to claim a cross and subsequently received treatment from physios - before remarkably being allowed to play on.
Beiranvand was stretchered off the field of play and has now been revealed to have suffered a "serious concussion."
Iran coach Carlos Queiroz revealed the 30-year-old had sustained a broken nose from the incident.
“According to my medical information and also the referee’s, they were not able to stop the player bleeding. It was something related to (his) broken nose.
"When we were ready to make the substitution, he was able to stop bleeding, so we thought that he could keep going.
"But we had some signs that the possibility of concussion, it happens with the player, it was not clear.
"Unfortunately, one minute later, the player was not able to keep going, and he suffered a serious concussion and at this moment he’s on his way to the hospital for more examinations.
"That’s why the delay happened. It was the doubt between the broken nose and the concussion."
England defeated Iran 6-2.