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How can I set certain products to be shippable to only certain countries in Woocommerce?

For example, during checkout, if Country is not USA, I want to show the message "We cannot deliver to your country."

This can be done mainly with a custom function hooked in woocommerce_package_rates filter hook.

The code below, will allow you to disable shipping, for specific products IDs or specific product categories (you can choose) based on defined country codes.

You will have to add your settings in the first function.

The code:

// HERE your settings - Utility function

function your_country_shipping_settings(){

    $results = array();

    // Can be based on "Product IDs" (or "Product categories" ==> false)

    $results['type'] = true; // or false



    // Allowed countries (Only compatible country codes - 2 digits)

    $results['countries'] = array( 'US', 'CA' );



    if( $results['type'] ){

        // Restricted product IDs

        $results['matching'] = array( 37, 38 );

    } else {

        // Restricted product categories (IDs, Slugs or Names)

        $results['matching'] = array('t-shirts', 'sweet-shirts' );

    }

    // Message

    $results['message'] = __( "can not be delivered to your country.", "woocommerce" );



    return $results;

}



// Utility function that check cart items

function get_items_names( $matching, $package, $type ){

    $product_names = array();



    // Search in cart items

    foreach( $package['contents'] as $item ){

        if( $type ){

            if( in_array( $item['data']->get_id(), $matching ) )

                $product_names = $item['data']->get_name();

        } else {

            if( has_term( $matching, 'product_cat', $item['product_id'] ) )

                $product_names = $item['data']->get_name();

        }

    }

    return $product_names;

}



// Conditionally disabling shipping methods

add_filter('woocommerce_package_rates','custom_country_shipping_rules', 10, 2 );

function custom_country_shipping_rules( $rates, $package ){

    if( isset($package['destination']['country']) && isset($package['contents']) ){

        // Load your settings

        $data = your_country_shipping_settings();



        // If matching allowed countries ==> We Exit

        if( in_array( $package['destination']['country'], $data['countries'] ) )

            return $rates; // Exit



        $product_names = get_items_names( $data['matching'], $package, $data['type'] );



        // When product match we Remove all shipping methods

        if( count($product_names) > 0 ){

            // Removing all shipping methods

            foreach( $rates as $rate_id => $rate )

                unset( $rates[$rate_id] );

        }

    }

    return $rates;

}



// Conditionally displaying a shipping message

add_filter('woocommerce_cart_no_shipping_available_html','custom_country_shipping_notice', 10, 1 );

add_filter('woocommerce_no_shipping_available_html','custom_country_shipping_notice', 10, 1 );

function custom_country_shipping_notice( $html ){

    $package = WC()->shipping->get_packages()[0];

    if( isset($package['destination']['country']) && isset($package['contents']) ){

        // Load your settings

        $data = your_country_shipping_settings();



        // If matching allowed countries ==> We Exit

        if( in_array( $package['destination']['country'], $data['countries'] ) )

            return $html; // Exit



        $product_names = get_items_names( $data['matching'], $package, $data['type'] );



        if( count($product_names) > 0 ){

            $text = '"' . implode( '", "', $product_names ) . '" ' . $data['message'];

            $html  = wpautop( $text );

        }

    }

    return $html;

}

Code goes in function.php file of your active child theme (active theme).

Tested and works.

When a cart item match with your settings and if customer is located in another country that the ones defined he will get something like:

On cart page:

On checkout page: