Hide taxonomy term in specific node form
Use hook_form_FORM_ID_alter

/**
 * Implements hook_form_FORM_ID_alter.
 */
function my_module_form_views_exposed_form_alter(&amp;$form, &amp;$form_state, $form_id) {
  $vocabulary_machine_name = 'my_vocabulary'; // Makes the search faster.
  $term_names = array(
    'Term 1',
    'Term 2',
    'Term 3',
  );

  foreach ($term_names as $term_name) {
    $term = taxonomy_get_term_by_name($term_name, $vocabulary_machine_name);
    unset($form['my_field']['#options'][array_pop($term)-&gt;tid]);
  }
}