If an employee is salaried, and he/she only worked 3 days that week due to being a "no call no show", is it okay to adjust their paycheck (salary) to the number of actual hours worked, or must they be paid their full salary, which was supposed to be based off them working about 45 hours per week.

Here are the labor laws for Colorado. You should find your answer there.

Colorado Labor Laws - (http://www.laborlawtalk.com/archive/index.php/f-55.html)

Specifically here

Docking salary Colorado [Archive] - Labor Law Talk (http://www.laborlawtalk.com/archive/index.php/t-156638.html)