If I buy a property outside USA for commercial purpose do I get any TAX deduction.

I don't see why you should..

Are you sure? Because I bought this property as a investment. I'm not doing any business there yet. Also I'm not US citizen. But I'm leaving in the USA for last 8 years. Also If I send some money to India for my mother's medical expenses can I deduct that. how do I prove that in case of audit that the money is actually being used for medical expenses.