Show forfeited deposit on property as capital loss while tax filing

We paid 5% deposit to the builder to buy a property . Our house possession is in couple of months. But we are rethinking our decision due to market shift. If we back out now from the house, will we be able to report forfeited deposit as capital loss while filing taxes? I see that only rental property deposit loss can be claimed, what can we do to show that the property the we put money on was intended for the rental use?