It is expecting some conditions to appear before the second (closing) bracket of the 'if' statement.
The 'out-of-the-box' code that would normally be here for the contactus.php form page is:
<?php
if (ValidatedField("contact","contact")) {
if ((strpos((",".ValidatedField("contact","contact").","), "," . "5" . ",") !== false || "5" == "")) {
if (!(false)) {
?>