My family member/spouse/friend/significant other is missing, and I think they are in Canada.
Contact your local police to report a crime in progress or to report a missing person. They can contact Interpol for overseas crime.
Additional information is available at the Department of State’s website https://ca.usembassy.gov/contact/ .
If you would like to speak to someone directly regarding a missing U.S. citizen in Canada, call the nearest U.S. Embassy or Consulate:
Calgary: 403-266-8962, press “0” for immediate assistance
Halifax: 902-429-2480
Montreal: 514-398-9695
Ottawa: 613-238-5335
Québec City: 418-692-2095
Toronto: 416-595-1700
Vancouver: 604-685-4311