Don't send recurring payment email reminder to specified levels.

exclude-levels-from-recurring-payment-reminder-email.php

<?php
/**
 * Do not sent recurring payment reminder email to specified levels.
 *
 * This may be useful to stop sending reminder emails for short
 * billing term recurring payment membership levels.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

function my_pmprorm_dont_send_reminder_to_levels( $send_mail, $user, $lastorder ) {

	// Set level IDs that should not receive a recurring payment reminder email here
	$no_reminder_levels = array( 3, 5 );

	// Get membership level for user
	if ( ! empty( $lastorder->membership_id ) ) {
		$membership_level = intval( $lastorder->membership_id );
	} else {
		$membership_level = pmpro_getMembershipLevelForUser( $user->ID );
		if ( ! empty( $membership_level ) ) {
			$membership_level = intval( $membership_level->id );
		}
	}

	// Don't send a reminder if the user has a level that shouldn't receive a recurring payment reminder.
	if ( ! empty( $membership_level ) && in_array( $membership_level, $no_reminder_levels ) ) {
		return false;
	}

	return $send_mail;
}
add_filter( 'pmprorm_send_reminder_to_user', 'my_pmprorm_dont_send_reminder_to_levels', 10, 3 );