Does Turkey have a "sell tax-free after 3 years" rule like Russia?

No.
In Turkey, the tax-free period for real estate ownership is 5 years.

But:

• the tax is calculated based on the cadastral value, not the market value
• inflation indexation is not considered profit

In practice, in many cases, no sales tax arises.

To ensure the proper execution of a purchase and sale transaction, we recommend contacting INCOME MERSIN for transaction support services.