"Is the employee who has completed 5 years of service before suspension pending enquiry?"
Gratuity and Suspension Pending Enquiry
Suspension pending disciplinary proceedings ending in punishment would not be counted for gratuity. The gratuity of an employee, whose services have been terminated for any act, willful omission, or negligence causing any damage or loss to, or destruction of, property belonging to the employer, shall be forfeited to the extent of the damage or loss so caused.
Conditions for Forfeiture of Gratuity
The gratuity payable to an employee may be wholly or partially forfeited:
(i) if the services of such an employee have been terminated for his riotous or disorderly conduct or any other act of violence on his part, or
(ii) if the services of such an employee have been terminated for any act which constitutes an offense involving moral turpitude, provided that such offense is committed by him in the course of employment.
The above extract is from the Act pertaining to when gratuity can be stopped.