can I suspended because of a work restriction and will be fired if I don't qualify for LTD

There are several different issues raised in this post. First, and one I cannot help with, is that if you have a physical injury or condition caused by, or exercerbated by the work you were doing, you may have a workers compensation claim.  I recommend you speak to a local workers compensation attorney to discuss that further.  Second, it is hard for us to speculate on the short term and long term disability issue.  Employment law does not require the employer to offer such benefits and does not control the eligibility or coverage issues that you have.  Short term and long term disability (other than Social Security Disability) is an insurance contract.  The insurer is required to provide benefits, but only for as long as the contract requires and only in the circumstances covered by the contract.   The third and final issue may well be the most important. If your employer has at least 15 employees, it is covered by the Americans With Disabilities Act which requires an employer to provide a "reasonable accomodation" to an employee with a disbility.  The accomodation must be designed to allow the employee to complete the essential functions of the job.  The EEOC has taken the position that a rule that requres an employee to be 100% to return to work is a violation of the ADA. At least initially, it sounds like you have a claim against your employer for a violation of the ADA. Speak with an experienced emploment attorney as soon as possible about this situation.