Set this to 3:
'posts_per_page' => 3
Add your div in loop
require($_SERVER['DOCUMENT_ROOT'] . '/blog/wp-load.php');
$args = array(
// 'cat' => 3, // Only source posts from a specific category
'posts_per_page' => 3 // Specify how many posts you'd like to display
);
$latest_posts = new WP_Query( $args );
if ( $latest_posts->have_posts() ) {
while ( $latest_posts->have_posts() ) {
$latest_posts->the_post();
?>
<div class="col-lg-4 col-md-4 col-sm-4 col-xs-4">
<?php echo get_the_title(); ?>
</div>
<?php
}
?>