Sri Lanka Tourism Development Authority (SLTDA) has release latest guidelines for tourist with effect from 29th September onwards including Sri Lanka tourism operational guidelines with latest health protocols for tourist. 
As per the latest guidelines no PCR test is required for fully vaccinated people who are coming to Sri Lanka under tourist VISA. 

For FULLY VACCINATED TRAVELLERS

Arrivals from 29th September 2021
1. Applies to International Tourists visiting Sri Lanka under tourist visa. No prior approval required from the Ministry of Foreign Affairs or Civil Aviation Authority for tourist who are coming for a holiday in Sri Lanka. 
There is no minimum duration of stay in Sri Lanka during your vacation in Sri Lanka. 
Travellers who have completed 14 days after the recommended doses of COVID-19 vaccination and arriving with a negative COVID-19 PCR Report done within 72 hours of embarkation will be considered as fully vaccinated travellers. Any vaccination type accepted by the country of origin will be accepted.
This protocol is applicable for travellers not arriving from or with no travel history (including transit) to any travel restricted country in the past 14 days. 

2. Prior to boarding, travellers are required to:
i. Visit www.visitsrilanka.gov.lk to pay for mandatory COVID 19 Local Insurance cover at USD 12 for a policy of USD 50,000 up to a period of one month (including children
below 2 years) and obtain the Tourism reference number required to apply for visa.
• If accompanied by not-vaccinated children of 12-18 years, pay for on-arrival PCR test at USD 40 per test.
ii. Have a valid tourist visa. All visas must be applied online. Visit eta.gov.lk. Ensure you include the Tourism reference number when applying for a visa.
iii. Have done a negative PCR test within 72 hours prior to embarkation (Children below 2 years are exempted).

3. At the airport produce the following:
i. Negative COVID-19 PCR report (English) taken within 72 hours prior to embarkation (Applicable to all travellers excluding children below 2 years).
ii. Original vaccination certificate / card (together with a certified copy of English language translation if the certificate / card is not in English or if relevant data are not
indicated in English).
iii. Completed Health Declaration Form. A separate form should be submitted for each of the accompanying children (if any).

4. On-arrival PCR tests
i. No on-arrival PCR test for “Fully Vaccinated” travellers.
ii. Not-vaccinated Children:
• No on-arrival PCR test for Not-vaccinated children up to 12 years and they will be allowed to travel with their parents.
• Not-vaccinated children of 12 -18 years need to undergo on-arrival PCR testing at the Ministry of Health approved laboratory at BIA or at a Safe & Secure Certified
Level 1 hotel. If the Day 1 PCR report is negative, they will be allowed to travel with their parents.
iii. No 2nd PCR for fully vaccinated travellers.

Accommodation & Airport transfers
Fully vaccinated travellers are allowed to make their own arrangements for accommodation, airport transfers and local transportation. However, advised to use safe and secure certified accommodations and safe & secure certified travel agents in Sri Lanka to ensure their health and safety.