The American was scheduled to attend a photo opportunity, but skipped it to leave Benn appearing alone.
Benn, 29, did have the company of his father, boxing legend Nigel Benn, who pretended to face off with his son.
After joking around with his dad, Benn said Garcia "didn't turn up".
"I apologise for Ryan doing what Ryan does and bottling it. We turn up, we're here, ready for the face-off," he said.
"Come Saturday, he's in for a war. "
Garcia defends his WBC welterweight title at the T-Mobile Arena in Benn's first world championship bout.
The 28-year-old is the favourite for the contest and after failing to attend the first face-off of fight week, Garcia mocked Benn on Instagram.
"Nice relaxing time as Conor wastes time showing up to a face-off," he said.
"Back to the sauna you go, sausage getting cooked every way. "
They are due to meet twice before fight night with the news conference on Thursday and the weigh-in on Friday.