The best substitutes for curry leaves are bay leaves, basil and kaffir lime leaves, according to Food.com. These seasonings give a somewhat similar taste to curry, but nothing compares to actual curry leaves used in Indian and Sri Lankan cuisines.
Many people around the world look for substitutes for curry leaves because of the leaves' short shelf life. Curry leaves can be dried, but they do not have the same taste as the fresh product. If a cook comes across a batch of fresh curry leaves, they can store them in the freezer for up to one week before they lose their freshness.