This is the first report of the incidence or occurrence of a leafspot or leaf fall disease caused by Corynespora cassiicola (Berk. and Curt.) Wei affecting rubber (Hevea brasiliensis) in this country. The disease was first observed by the authorresearchers in RRIM 600 rubber seedlings and young trees at USMARC nurseries and plantations sometime in October 2008. Standard laboratory procedures were done: fresh specimens of infected rubber leaves were collected, thin sections of the infected tissues made, and direct examinations on slide mounts observed under a compound microscope. Morphocultural characteristics of the fungus were noted through microscopy and the fungal growth observed on various culture media. Pathogenicity tests were confirmed by inoculating healthy Hevea seedlings. Identity was confirmed through literatures.