A team of Guelph police officers has been assigned to investigate the case of coffee shop owner Seble Dietrich, 39, who has not been heard from since July 10th.

"Nobody has heard from Seble….for some time now," said Det. Manfred Hoyer. "With every passing day it becomes a little more suspicious as to why she hasn’t contacted anybody and…that’s out of character for her."

Dietrich, who also goes by the name of "Mimi", owns a coffee shop called Sidamo Coffee in downtown Guelph. Investigators say she was last seen driving her car, a red 1999 Mercedes SLK and left her home sometime between 12:00 p.m. on July 10th and 6:00 p.m. on July 11, 2014.

Gamachu Tessema Dietrich Guelph cofee shop

Close friend of Seble "Mimi" Dietrich, Beletu Gamachu (left) says she's been hanging out at the Guelph Hasty Market with owner Sentayeh Tessema (right) because she doesn't want to be alone while her friend is still missing. (Jane van Koeverden/CBC News)

Police found her car parked at her coffee shop.

When Dietrich was first reported missing on July 19th, police said she was known to travel between Guelph and Ethiopia. Now that three weeks have passed by since anyone has heard from her, police are growing concerned.

Dietrich’s friend, Beletu Gamachu, 41, said Dietrich was an active member of the Ethiopian community in Guelph and Waterloo Region and was always willing to lend a hand.

"I feel very sad, and I’m shocked," said Gamachu. "She was like a sister to me."

Guelph detective Manfred Hoyer dietrich missing coffee shop

Investigators are asking anyone with information to contact Guelph detective sgt. Manfred Hoyer at 519-824-1212 ext. 7331.

Gamachu said Dietrich is married with three young kids. 

Guelph police have a dedicated team of officers working on the investigation. They ask anyone with information to contact Det. Manfred Hoyer at 519-824-1212 ext. 7331.