@spogue You can use a for loop and if statements to increase the plus_time if the weekday lands on a Saturday or Sunday. You’ll probably want to put this in a custom module instead of directly in the email though.
{% for day in [1, 2, 3] %}
{% if datetimeformat(local_dt|plus_time(day,'days'), '%A') == "Saturday" %}
{{ datetimeformat(local_dt|plus_time(day + 2,'days'), '%A, %B %e, %Y') }}<br>
{% elif datetimeformat(local_dt|plus_time(day,'days'), '%A') == "Sunday" %}
{{ datetimeformat(local_dt|plus_time(day + 1,'days'), '%A, %B %e, %Y') }}<br>
{% else %}
{{ datetimeformat(local_dt|plus_time(day,'days'), '%A, %B %e, %Y') }}<br>
{% endif %}
{% endfor %}