Fianna Fail were entitled to send one of their party councillors to accompany the Mayor on the week-long trip later this week.
However when Fianna Fail met to discuss who would accompany the Mayor, none of their councillors wanted to go.
There have been several bust-ups between Mayor McBrearty and members of Fianna Fail in the council chamber in Lifford in recent months.
At a meeting last month – which was held behind closed doors – councillors could be heard shouting at each other from outside the corridor.
At the Fianna Fail meeting to select who would go on the €24k trip, all the party’s representative declined the offer.