Trainer D. Wayne Lukas said early Thursday at Churchill Downs that withdrawing the colt "wasn't an easy decision, because he's really doing good."
Lukas noted that Dublin "has had five races in 12 weeks" and he wanted to give the colt "a little break" before gearing back up for major races such as the Haskell, Jim Dandy, or Travers before ultimately pointing for the Nov. 6 Breeders' Cup Classic at Churchill.
"The race in front of you always looms the most important one," said Lukas. "Then once you get past that, the next one has the greatest magnitude. Knowing how that goes, we'll sit this one out and wait for the next series of big races."
Dublin, seventh in the Kentucky Derby on May 1 and fifth in the Preakness last Saturday, would have been the only horse to have run in all three races. Five horses from the Derby also ran in the Preakness, but now none are back for the Belmont. The last time no horse raced in all three was in 2006, which also was the last time neither the Derby nor Preakness winner ran in the Belmont.