Necessity of Suspension
In case you allowed a suspended employee for duty, then what is the necessity for suspension? As rightly mentioned by Mr. Umakanth, suspension of an employee is to avoid the possibility of tampering with the evidence and the gravity/seriousness of the misconduct.
If you are allowing the suspended delinquent employee for duty, then why were they suspended in the first place? In case they work, are you paying the subsistence allowance, the salary, or both?
Suspension Pending Inquiry
If you have suspended an employee pending an inquiry, then you need to continue until the domestic inquiry is completed, the report is submitted, and the punishment is cleared. If the punishment is other than termination, then you need to allow them to return to work after they have completed the punishment.
Allowing Duty During Inquiry
When there is no suspension, then you will allow duty until the completion of the inquiry, and if the punishment is other than termination.
Being allowed to join duty until the completion of the inquiry is not applicable once the employee is suspended. They are allowed to return to work upon the completion of the inquiry and if the punishment is other than termination.
Hope this clarifies things.
Thanks,
Kameswarao