Insert Div Between ACF Repeater Field Row

The repeater field allows you to create a set of subfields which can be repeated again and again whilst editing content! here is the code for Insert div between ACF Repeater field row, means I need to insert a div after every 3rd row of repeater field.(loop repeater rows 3 in a div and then next 3 more in a div)
Like Below Code

<div class="row">
  <div class="repeater-field-1 slideitem"></div>
  <div class="repeater-field-2 slideitem"></div>
  <div class="repeater-field-3 slideitem"></div>
</div>
<div class="row">
  <div class="repeater-field-4 slideitem"></div>
  <div class="repeater-field-5 slideitem"></div>
  <div class="repeater-field-6 slideitem"></div>
<div>

Here is the php code

<div class="row">
  <?php 
    if (have_rows('repeater_name')) {
      $count = 0;
      while (have_rows('repeater_name')) {
        if ($count > 0 && ($count % 3 == 0)) {
          // after first itteration
          // close li and open a new one every 3 rows
          ?>
            </div>
            <div class="row">
          <?php 
        }
        the_row();
        ?>
          <div class="slideitem"><?php the_sub_field('repeater_content'); ?></div>
        <?php 
        $count++;
      }
    } else {
    }
  ?>
</div>