Query events in cat with tribe_get_events() (TEC 2.0.11)

<?php
$all_events = tribe_get_events(array(
    'eventDisplay' => 'upcoming',
    'posts_per_page' => 3,
    'tax_query' => array(array(
        'taxonomy' => 'tribe_events_cat',
        'field' => 'slug',
        'terms' => 'your-category-slug' )),
    'order_by' => 'title',
    'order' => 'asc'
));

foreach($all_events as $post) {
    setup_postdata($post);
    the_title();
}