In Belfast, members of the public could not attend the event at City Hall and there was an overall limit on the number of people allowed to gather.
A short ceremony, led by Lord Mayor Frank McCoubrey, was live-streamed online.
In Enniskillen, Taoiseach (Irish Prime Minister) Micheál Martin represented the Irish government at a Remembrance Sunday service in St Macartin’s Cathedral.
He also laid a wreath at the town’s war memorial alongside First Minister Arlene Foster.
In 1987, 12 people were killed by an IRA bomb during the town’s Remembrance ceremony.
Speaking at the event, Mrs Foster said Mr Martin had been “very keen to come here today to continue that tradition that has now been set up”.
She added: “He is very welcome here in Enniskillen as we mark what is a very important day, right across Northern Ireland, but of course here in Enniskillen, it has a particular resonance.”
Mr Martin said it was a privilege to be able to show “solidarity with all of the people in Enniskillen and beyond”.
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A short and socially distanced service was held today at Belfast City Hall to mark Remembrance Sunday. Lord Mayor of Belfast Alderman Frank McCoubrey laid a wreath at the Cenotaph and a two minute silence was observed. Photo Pacemaker Press
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Lord Mayor of Belfast Alderman Frank McCoubrey lays a wreath at the Cenotaph at Belfast City Hall to mark Armistice Day and Remembrance Sunday. The service was scaled back this year due to COVID-19 restrictions. Picture by Jonathan Porter/PressEye
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Remembrance Day at the Cenotaph in Enniskillen, Co Fermanagh Micheal Martin TD, Irish Taoiseach Photo: Pacemaker
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A short and socially distanced service was held today at Belfast City Hall to mark Remembrance Sunday. Lord Mayor of Belfast Alderman Frank McCoubrey laid a wreath at the Cenotaph and a two minute silence was observed. Photo Pacemaker Press