Bog Warrior has been ruled out of Sunday's Grade One John Durkan Memorial Punchestown Chase.
Tony Martin's charge has been declared a non-runner for the two-and-a-half-mile feature leaving just three runners to go to post.
Horse Racing Ireland tweeted: "Bog Warrior is a non runner. Coughing."
Flemenstar, Sir Des Champs and Rubi Light now make up the select field.