Irish Agriculture Minister Dara Calleary has resigned after attending a golf dinner with more than 80 people, APA reports citing BBC.
Wednesday's Oireachtas Golf Society event at a County Galway hotel came a day after Dublin announced a tightening of lockdown restrictions.
Dara Calleary had been in post for a month; he replaced Barry Cowen who was sacked after a drink-driving scandal.
The Irish PM accepted the resignation, saying Mr Calleary's behaviour "was wrong and an error of judgement".
In a statement on Friday, Taioseach Micheál Martin said: "People all over the country have made very difficult, personal sacrifices in their family lives and in their businesses to comply with Covid regulations."
"This event should not have gone ahead in the manner it did, given the government decision of last Tuesday."