Dheeraj Reddy Donthi is a student at the Blekinge Institute of Technology (BTH) and was with friends at home before leaving his flat around 9.30pm on Thursday night.
"He told his roommates he was heading over to the university," Krishna Paruchuri, a friend of Donthi's, told The Local.
Although he said he was going to the school to study, Donthi didn't take his laptop with him.
Since then, no one has seen or heard from Donthi, and repeated attempts to reach him on his mobile phone have been unsuccessful.
At first, close friends thought that he was visiting acquaintances elsewhere, although these friends later confirmed this was not the case.
On Saturday, his friends reported Donthi's disappearance to the police and, nearly a week after he went missing, remain stumped and concerned as to where he might be.
"He didn't have any problems that anyone knew of. Things seemed to be going really well," Paruchuri said.
"If he wanted to leave the country, he would have taken his passport, but he left it at home.”
Donthi has been in Sweden for a year and a half and speaks limited Swedish, according to Paruchuri.
"His parents are very worried. They're planning to come to Sweden soon,” he said.
Police in Blekinge confirmed that they received a report about Donthi's disappearance and are looking into the matter.
Donthi was last seen wearing a grey hooded sweater, black jacket and blue jeans.
He has short hair, wears glasses, and has a slender physique.
Anyone with information relevant to the case is advised to call the Swedish police at 114 14.