Ultimate Member: Disable sending email by a user role

functions.php

function um_custom_disable_by_role( $disable_sending, $email, $template, $args ) {
	$user = get_user_by( 'email', $email );
	if ( user_can( $user, '{necessary_role_for_disable}' ) ) {
		$disable_sending = true;
	}
	return $disable_sending;
}
add_filter( 'um_disable_email_notification_sending', 'um_custom_disable_by_role', 10, 4 );