What actually limits investor activity in Saskatoon is ordinary supply and demand, not statute. The Saskatchewan REALTORS Association's own release shows 1.63 months of supply, and any buyer, institutional or individual, competes for a limited number of listings just like everyone else.
Canada has separate federal rules addressing non-Canadian ownership of residential property in some circumstances, which is a different policy question from a waiting period aimed at institutional buyers, and neither the City of Saskatoon nor the province has layered a local version on top of it.
If you are competing against a cash offer or a bulk buyer, the useful tool is a clean, well-supported offer, not a law that does not exist here. Get your hand-reviewed valuation from Joel Dyck.