As a general matter, there is no right to miss work due to illness or hospitalization. Therefore, if you missed work without properly using paid time off (e.g. sick days) which you had accrued to cover your absence and/or without employer permission, you could be fired; since you could be fired for this, you could be suspended indefinitely, or for as long as your employer wants.It would be different if your employer was covered by the Family and Medical Leave Act (FMLA), which means it has at least 50 employees; you are eligible under FMLA (have worked here for at least 12 months; have worked at least 1,250 hours  in the past 12 months); your illness or condition was serious enough to warrant FMLA leave (e.g. three days of hospitalization or bed care); and you provided notice that you were using FMLA leave. If this was the case, you may not be fired or suspended for using FMLA leave; but otherwise, as noted, unless you used PTO or had employer permission, your employer may suspend you as long as it likes.