The federal government’s recent changes to mortgage lending rules have injected uncertainty into the real estate market, the president of the Canadian Real Estate Association said Friday.

The measures — which include an expansion of a stress test for borrowers that takes effect Monday — could deter first-time homebuyers, said Cliff Iverson, who represents more than 100,000 real estate brokers across the country. “The finance minister’s recent changes to regulations affecting mortgage lending has added to housing…