“PROCESSES FOR THE PREPARATION OF ISOINDOLINE COMPOUND AND INTERMEDIATES THEREOF” The present invention provides processes for the preparation of isoindoline compound and intermediates thereof. The present invention provides processes for the preparation of apremilast or its pharmaceutically acceptable salts, hydrates, solvates, polymorphs or intermediates thereof. The present invention also provides compound of Formula (IX), (X), (XI), (XII) and (XIII).