// Load ContactForm7 scripts & CSS only on page called "Contact"
add_action( 'wp_print_scripts', 'my_deregister_CF7_javascript', 100 );
function my_deregister_CF7_javascript() {
  if ( !is_page('CONTACT') ) {
    wp_deregister_script( 'contact-form-7' );
  }
}

add_action( 'wp_print_styles', 'my_deregister_CF7_styles', 100 );
function my_deregister_CF7_styles() {
  if ( !is_page('CONTACT') ) {
    wp_deregister_style( 'contact-form-7' );
  }
}