The unsettling video was posted on Liveleak and YouTube.
The disturbing video was leaked onto the internet Tuesday, and begins with what appears to be a heated argument between a woman and a worker at a cash register.
She then picks it up from the ground and hurls it at employeesLiveLeak
She then pulls down her yoga trousers, defecates on the floor and throws the feces at an employee. The woman then heads for the container with the serviettes and pulls out a few. She then grabs some napkins and pulls down her trousers. She then fled the scene.
"In limited cases across the country, restaurants have a restricted access policy for restrooms to ensure the well-being of our guests", they said.
The woman, who used nearby napkins to clean herself during the incident, was reportedly refused access to the store restroom.
"We strive to create a welcoming environment for all of our guests and the communities we serve", the statement added.
Tim Hortons said the safety of staff and customers is a top priority and the corporation is working with the franchise owner to continue to look into the incident.
The woman was picked up by the RCMP but has been released from custody and will appear on court at a later date.
Calls to the Tim Hortons were referred to the company's spokesperson. Tim Hortons on Monday.