Can a police salute under suspension?

It is unclear what is being asked.

The term "under suspension" can be interpreted in two ways. The first will be interpreted as meaning that only their police powers are suspended but they are still in uniform and on duty, perhaps performing some administrative, non-public-contact task. In this instance - if they are still on duty and performing a departmental function in uniform they may be required to render a hand salute to a superior officer (Lieutenant or higher).

The second meaning of suspension is that the officer has been relieved entirely of their duties (and possibly their pay) and would definitely NOT be considered to be on-duty, nor would they be allowed to wear their uniform. In this instance they would not have to render a salute to a superior.