If your Sri Lanka visa is going to expire in due time call the Immigration Department, Colombo and get advice on how to renew it before it expires. Staying in Sri Lanka without a valid visa is illegal.
Immigration Department, in Colombo can advice you on how to visit their office and to extend your visa before it expires.
Also they will guide you on how to get a local visa agent to assist you in renewing your visa.
If happened so, you may be arrested and will be produced in front of local courts and legal action will be taken.
Also the violators may be held at the detention centre according to the law.
Sometime you may have to pay fines too for your carelessness.
If you happened to overstay without a valid Sri Lanka visa, your country local embassy too can't help you against the country law.
You have to pay the visa renewal fee.
You will have to provide color photo of yourself.
You have to use the proper visa renewal form and must fill it completely.
Immigration Department, Colombo: Located near to the Arpico Super Centre, Battaramulla, Sri Lanka.
Public holidays, Sundays and Poya days are the best time to make low priced calls to any part of the world from Sri Lanka through out the day and night.
International country code of Sri Lanka is +94 or 0094.