I have a beautiful fall blooming camellia that i planted 1 1/2 years ago.
14+ Camellia Brown Leaves. Camellia leaf gall causes leaves to become distorted, pale, thick, and fleshy; They gradually turn white, then brown, then drop from the plant.
Camellia Leaf Gall Home Garden Information Center from hgic.clemson.edu
In taht case, their is nothing much to do. Flowers are rather smaller than other camellias, white. The best control is to pick up and destroy affected leaves.
Two fungal pathogens of camellias cause brown leaf blotches, premature leaf loss and twig or branch dieback.