Mona McSharry finished fifth in the 100m breaststroke final at the European Swimming Championships in Rome.
The Olympic finalist was in fourth at the turn and battled for a place on the podium but was squeezed out by 0.24 of a second.
Italy took gold and silver through Benedetta Pilato (1:05.97) and Lisa Angiolini with bronze going to Lithuania's Ruta Meilutyte. Another Lithuanian, Kotryna Teterevkova was fourth.
McSharry's time of 1:07.14 was 0.70 of a second slower than her semi-final performance, which would have been enough for bronze.
"I put high expectations on myself and that's not where I wanted to be tonight," the 21-year-old told RTÉ Sport afterwards.
"It would have been nice to go another 1:06. But that's the way the cards fall sometimes. I did all I could.
"I've been struggling with the back 50 and I was trying to work better on that.
"If you had asked me the time before I saw it I probably would have guessed faster. It felt better but you can't predict it sometimes."
The Sligo woman will be back in the pool tomorrow morning for the 200m breaststroke heats.
Mona McSharry was surprised by her fifth-placed time in the European Swimming Championships breaststroke final, saying she had felt good throughout pic.twitter.com/J51xJ4LE8l— RTÉ Sport (@RTEsport) August 13, 2022
Danielle Hill was sixth in her group and 11th overall in the 50m backstroke semi-final . She swam 28.54, exactly the same time as her heat this morning, but missed out on a place in the top eight by 0.36 of a second.
Darragh Greene swam 2:12.73 to finish 13th in the 200m backstroke semi-final, one second outside the qualifying mark.
Longford native Greene had qualified with a time of 2:12.53 - seventh overall - in this morning's heats.
Athlone's Eoin Corby missed out after his time of 2:14.75.
Brendan Hyland was the best of the Irish competitors in the 100m butterfly heats. His time of 53.36 earned second place in his heat but 26th overall, with only the 16 fastest progressing. Shane Ryan (54.29) and Max McCusker (54.36) also took part.
In the women's 200m freestyle, Victoria Catterson came home seventh in her heat in a time of 2:02.56.
Watch highlights of the European Swimming Championships on RTÉ2 from 11.15pm on Saturday