If you can prove your grand parents origin in India, you can come under POI then it can make a difference. otherwise even though you are Tamil speaking but holder of Srilankan Passport and if your parents or grand parents are not from India, then you will not fall under the category of POI (Person of Indian Origin) hence you cannot buy and get transfer any immovable property in India.
Under section 2 (ze) of the Foreign Exchange Management Act, 1999 ‘transfer’ includes among others, ‘purchase’. Therefore, a foreign national of non-Indian origin resident outside India cannot acquire any immovable property in India by way of purchase.
There are other legal ways for foreigners to buy property but all will require RBI permission.
Ibrahim Deshmukh
Legal Consultant
Email: ibdesh@gmail.com
www.law-india.com