In the first two months of the year arrivals were up 10.9 percent to 288,798.
Arrivals from Western Europe, a key generating market for resort tourist rose 10.5 percent in March to 44.008 with UK rising 8.8 percent to 13,088, Germany up 16.3 percent to 9,145 and France up 7.0 percent to 6,973.
Netherlands rose 12.8 percent to 3,119, Sweden rose 2.1 percent to 2,390. After March the Western European market slows.
South Asian arrivals fell 6.7 percent to 19,261 with arrivals from India, Sri Lanka's largest source of arrivals plunging 18.1 percent to 11,789.
Arrivals from India has been weak since the re-imposition of visas, but recent nationalist action by Tamil Nadu chief minister Jayalalitha and some others against Sri Lankan tourists had led to a disruption of two way traffic.
State-run SriLankan Airlines also slashed flights to Tamil Nadu.
Arrivals from Maldives rose 23.1 percent to 4,742 and visitors from Pakistan fell 5.1 percent to 1,695.
East Asian arrivals rose 12.1 percent to 11,008 in March with China rising 53 percent to 2,208. So far this year Chinese arrivals have grown 56.6 percent to 8,353.
Japan also performed strongly rising 43.6 percent to 2,515 up 21.4 percent but Singapore fell 35.4 percent to 1,011 and Malaysia fell 34 percent to 1,292. In March, Malaysia based budget carrier AirAsia pulled out of Colombo.
Arrivals from Eastern Europe rose 19 percent to 9,635 with Russian arrivals up 38 percent to 4,143 and visitors from Ukraine up 67 percent to 3,092.
Middle Eastern arrivals fell 3.6 percent to 3,796. Middle Eastern arrivals usually pick up in the middle of the year as Western Europe slacks off.
This year analysts would be watching the market closely to see whether it reacts to actions by Sri Lankan nationalist's against the island's Muslim minority, including their dress, Halal food labeling and calls to boycott their businesses.