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add_filter( 'wpcf7_load_js', '__return_false' );
add_filter( 'wpcf7_load_css', '__return_false' );

<?php
if(is_page('contact')) { //pass your contact page slug here
    if ( function_exists( 'wpcf7_enqueue_scripts' ) ) {
        wpcf7_enqueue_scripts();
    }
  
    if ( function_exists( 'wpcf7_enqueue_styles' ) ) {
        wpcf7_enqueue_styles();
    }
}
 
get_header(); ?>