"There has also emerged a widespread hatred and constant barrage of negativity to landlords in general who have in the past been thinking they have been doing a good service for the community and also providing for their future."
Investors exiting the residential market could free up houses for first-home buyers but this would not help renters.
He agreed with this week's prediction from Property Institute chief executive Ashley Church that the cost of renting would replace the price of housing as the top housing issue in 2018.
"If the current situation continues or worsens we could see a widespread rental property shortage," Darmody said.
Housing Minister Phil Twyford told Fairfax this week that he viewed increasing housing supply as the only way to seriously keep rental prices in check.
The Government has promised to build 100,000 affordable homes over the next 10 years while modernising tenancy law and introducing healthy homes legislation to ensure rentals are warm and dry.