Is the Sri Lankan ETA a single or multiple entry authorization?
The Sri Lanka ETA let’s you enter the country for a limited number of times. If your visit has a specific reason for staying longer, we suggest you contact the embassy directly.
The Sri Lanka Tourist ETA lets you enter the country twice within its 6-month validity. Not so for the Business ETA. Business ETAs provide multi-entry and have to be applied for separately, unlike a regular Tourist ETA.
However, the use of an ETA for transit is a single entry authorization and only permits one entry during its validity.