Dear Hassams,
Government has abandoned the policy of selling the properties to the foreigners. They have replaced it with the 99 year leasehold.
Kalpitiya, Negombo, Arugambay, Kalkudah, Panama, Bentota, Galle, Matara, Hill Country and the Cultural Triangle found to be the ideal destinations for such an investment.
However I would like to suggest you to visit the country or build some relationship some individuals over the linkedin or similar forums to get an idea about the country, its economic situation first.
Reason: exact situation is not the same as what you are seeing from the outside.
If you need any assistance over the available options, just drop a PM. I will try to answer your questions as much as possible.
Thanks,
Zee