Ireland captain William Porterfield conceded the nation's fans had been let down by the heavy one-day international defeat against Pakistan.
Hosts Ireland were skittled out for 96 before Pakistan eased their way to a seven wicket win with 51 balls remaining in a match reduced to 36 overs by rain.
And the one-sided encounter was untimely for Ireland as they look to overturn a decision from the ICC to omit the associate countries from the next World Cup.
The move, which is set to be discussed again next month, was met with widespread condemnation - particularly after Ireland's memorable 2011 World Cup campaign.
However, their cause was not helped by a dismal batting display in Belfast.
But Porterfield insists his side can bounce back in Monday's final game of the two match series.
He said: "We've let a few people down today but we'll be looking to turn that around come Monday.
"We are disappointed in the way we performed today.
"We wanted to put on a performance for the fans that turned out and keep a buzz around Irish cricket.
"It is disappointing to make 96 but, as I've said before, it (the World Cup decision) is not something we think about or put in the forefront of our minds.
"We go out there with a plan to win a game and we didn't do that today.
"We didn't execute anything with the bat. We didn't put any type of performance together."
He added: "We have to rectify that for Monday - we will do that."