Jobless figures fall by more than 4,200
But the numbers on the Live Register saw a slight increase of 300, when seasonal factors are included.
The CSO said the standardised unemployment rate went up to 4.6% last month, from 4.5% in February. Almost 169,000 people were on the Live Register in March, with part-time and casual workers making up 23,000 of the total. The year-on-year increase in Live Register numbers was 0.5%.