Sharon Vennard was defeated at the quarter-final stage of the women's individual recurve archery event at the Paralympics in London on Sunday.
The Greyabbey woman lost 71-63 to the third seed, Yan Huilian from China.
Vennard had beaten Oyun-Erdene Buyanjargal at the Royal Artillery Barracks on Saturday.
Also on Saturday, Eilish Byrne finished fifth in the Individual Para Dressage and James Brown was ninth in the Men's Individual B 1km Time Trial.
Armagh woman Byrne had returned a score of 73.429% on her chestnut gelding Youri to improve on her seventh position in the first individual event on Thursday.
"I'm just over the moon, I can hardly believe it. I'm delighted," said Byrne afterwards.
Portaferry man Brown clocked a time of 1:07.979 on his way to ninth on Saturday.
The 47-year-old visually impaired cyclist has previously competed in a total of five winter and summer Paralympics across a range of sports.
Byrne is taking part in her second Paralympics, having achieved eighth and 11th place performances in Beijing.
The Armagh woman scored a solid 67.714% on Youri on Thursday, although she felt her performance was slightly below par.
"Youri was a little tense and I struggled to keep him relaxed. Our score was a little lower than usual," said Eilish after that event.
The Dundalk-born rider will also compete in the Freestyle and Team events for Ireland in Paralympic Grade II.