Yes, unfortunately you can be suspended for this.  Typically employment relationships are "at will".  So basically an employer can hire or fire someone for any reason or no reason whatsoever, as well has increase/decrease salary/hours, promote/demote, and generally impose requirements as they see fit.  An employee in turn can work for an employer or not, their choice.  Unless there is a stated company policy contrary to such action, or there is a union/employment agreement that does not allow for it, or this situation has arisen due to some type of discrimination (i.e., for reasons due to your race, religion, age, disability, sex, national origin).  Absent any of the foregoing, your employer's action does not violate any laws.