Status: Researched. See the Sri Lanka country page for the full picture.
Why NDB Securities
NDB is one of the clearer Sri Lankan brokers for foreign individuals — it publishes a foreign-citizen account page and document list, and (like most CSE brokers) routes trading through the shared ATrad platform, so the broker you pick matters more for service and IIA help than for the trading interface.
The real constraint
The rate-limiting step is not the broker but the Inward Investment Account (IIA), the designated Sri Lankan rupee account required for inward investment and repatriation (structurally like Vietnam’s IIA). Some banks support remote IIA onboarding; others don’t. Ask your chosen broker which banking partners they work with and whether they can facilitate IIA setup. Other reasonable starting brokers: LOLC Securities, Capital TRUST, First Capital, CAL, John Keells.