Dion Charles scored the second of NI's goals in a 2-0 win over Denmark in November
Northern Ireland will play away friendlies against Romania and Scotland during the March international window.
The game against Romania is scheduled for Friday, 22 March, with the kick-off time at the Arena Nationala in Bucharest still to be confirmed.
Hampden Park in Glasgow will be the venue for the friendly against Scotland on Tuesday, 26 March (19:45 GMT).
Both the Romanians and the Scots have qualified for the Euro 2024 finals in Germany next summer.
- Scotland: Netherlands & Northern Ireland friendlies lined up for March
Northern Ireland, who ended a disappointing European Championship qualifying campaign on an upbeat note with a 2-0 win over Denmark in November, are set to play two further friendly games in June, before the start of their Nations League campaign in the autumn.
Romania booked their place at the Euro finals by topping Qualifying Group I with six wins and four draws from their 10 matches.
In Germany, the Romanians will be competing in Group E alongside Belgium, Slovakia and a play-off winner.
Scotland qualified after they finished runners-up in Qualifying Group A to Spain.
Next summer, the Scots will face hosts Germany, Hungary and Switzerland in Group A at Euro 2024.
Source: bbc.com