// count up function fires on save post
function count_live_venues( $post_id ) {

    if (get_post_type() == 'venue') {

        // get country info
        $slug = get_the_terms( $post_id , 'country')[0]->slug;
        $term_id = 'country_' . get_the_terms( $post_id, 'country')[0]->term_id;

        // exclude discontinued meta_queery
        $exclude = array(
            'relation' => 'OR',
          array(
              'key'       => 'venue_discontinued',
              'compare'   => '!=',
              'value'     => true
          ),
          array(
              'key'       => 'venue_discontinued',
              'compare'   => 'NOT EXISTS'
          ),
        );

        // args
        $all_args = array(
            'post_type'             => 'venue',
            'post_status'           => 'publish',
            'country'               => $slug,
            'posts_per_page'    => -1,
            'meta_query'            => $exclude,
        );


        // update 'total_venues' with count of posts
        update_field('field_5c788ae1ec24a', $totalvenues, $term_id);

    }

}

// run after ACF saves the $_POST['acf'] data
add_action('acf/save_post', 'count_live_venues', 20);

// run whenever trashed / restored
add_action(  'trashed_post',  'count_live_venues' );
add_action(  'untrashed_post',  'count_live_venues' );