The former Paisley Grammar School pupil is facing deportation after having seen two appeals rejected.
Mr Darku, 23, was pulled out of the room by university staff when sitting his final exam and told there was a problem with his visa.
He has then been forced to drop out of his degree studies at Stirling University while he goes through the appeals process, he told the Sunday Mail.
UK officials have told him he has not been able to prove he is dependent on his father, who is a European citizen since he is over 21.
Mr Darku’s Ghana-born father Joseph spent several years living in Holland while his son remained in Scotland.
He has now returned to Edinburgh and insists he continues to support his son financially.
The student nurse also served in the Scottish Youth Parliament.
Mr Darku said it was devastating what the home office is doing to him as he worked so hard to fit in the community: “there were not many black faces at school and I worked hard to fit in.”
“But I soon became part of things and I began to enjoy life here very much – it’s the only home I have now.”
Denzel Darku’s MSP Neil Bibby is backing his fight to stay and find cruel and pointless the fact that the life of the young boy is being turned upside down.
He added: “Denzel has already shown a commitment to public service and our community.”
The West of Scotland MSP posted a supportive message on his Facebook account, asking for it to be shared as much as possible.
According to him, “the Windrush and hostile environment scandal have opened our eyes to the Tory Government’s heartless approach to immigration – Denzil represents an early opportunity to put this right.”
Gary Christie, head of policy at the Scottish Refugee Council, added: “stories like this show the vast reach of the hostile environment and the devastating impact it has on people who have grown up here and built their lives here.”
The Home Office said:” all applications are considered on their individual merits and in accordance with the immigration rules.”
A Home Office hearing into the case will be held in June.