TORONTO - The parents of a 17-year-old Toronto girl have made a heartfelt appeal for their daughter, whom they haven't seen for three days, to get in touch with them.

Mariam Makhniashvili was last seen by her family when she left for school with her brother on Monday morning (near Bathurst Street and Eglinton Avenue West).

They entered by different doors.

The girl did not arrive home from school and the parents began looking for her and contacted police, who say they are concerned for her safety.

The principal of Forest Hill Collegiate Institute says Miriam did not attend classes Monday.

Her parents appealed at a news conference Thursday for Miriam to contact them.

"We all love you. We miss you. We want you back," her mother, Lela, said as she fought back tears.

The parents said there was no dispute that would have prompted the girl to run away.

"No. She was an absolute perfect student, perfect daughter," her father, Vakhtang, said.

"She was absolutely happy."

However, police say they have no evidence of foul play.

"We certainly have no reason to believe that she was abducted or taken against her will in any way, shape or form," Det. Steve McIlwain told CTV.

The family has only been in Toronto for three months and the father said Miriam had not yet made friends, since school had just started.

The parents have lived in Los Angeles for five years before moving to Toronto, while the girl and her brother lived with their grandparents in the Republic of Georgia.

The family was reunited when the parents moved to Toronto in June.

Vakhtang Makhniashvili said his daughter knows about calling 911, and police said she knows enough English to make herself understood.

She did not have a cellphone.

Staff Insp. Larry Sinclair added his voice to the appeal.

"Please call a family member, a friend, the police and let us know you're safe," he said.

Lela Makhniashvili said they would have detected any change in their daughter to indicate she was having problems.

"We haven't noticed anything," she said. "We would notice anything."

She said it has been hard not knowing where Miriam is.

"It's very hard to express. But we're coping. We're hoping she'll be back with us."

School principal Peggy Aitchison said they are ready to mobilize an army of "a thousand" parents to look for the girl.

"We've had tremendous emotional support back from our parents," she said.

"We have asked students to be aware and let us know if there's something out of the ordinary that happened during the first week of school."

The girl is 5-foot-3 with light-brown, shoulder-length hair and brown eyes. She was last seen wearing black pants, a light blue shirt and a dark blue jean jacket. She was carrying a large black backpack with a green stripe.