diff --git a/app/javascript/vue/forms/field.vue b/app/javascript/vue/forms/field.vue
index 5170db4c1..1a4c6dbad 100644
--- a/app/javascript/vue/forms/field.vue
+++ b/app/javascript/vue/forms/field.vue
@@ -19,6 +19,9 @@
       {{  i18n.t('forms.fields.submitted_by', { date: field.field_value.submitted_at, user: field.field_value.submitted_by_full_name}) }}
     </span>
     <button class="btn btn-secondary mb-0.5"
+            :title="i18n.t('forms.fields.mark_as_na_tooltip') "
+            data-toggle="tooltip"
+            data-placement="top"
             :disabled="disabled"
             v-if="field.attributes.allow_not_applicable"
             :class="{
@@ -87,6 +90,7 @@ export default {
     if (this.$refs.description) {
       this.$nextTick(() => {
         window.renderElementSmartAnnotations(this.$refs.description, 'span');
+        $('[data-toggle="tooltip"]').tooltip();
       });
     }
   },
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 0442037e0..de435d808 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -1098,6 +1098,7 @@ en:
       description_html: "<p>Publishing a form locks it for editing and makes it available for use in protocol steps. You can unpublish the form only if it isn't linked to any steps.</p><p>Are you sure you want to publish the form?</p>"
     fields:
       mark_as_na: "Mark as N/A"
+      mark_as_na_tooltip: "'Mark as N/A' will delete content in this field."
       add_text: "Add text"
       add_number: "Add number"
       from: "From"