Hi,
If a company is suspended does not mean their shares are worthless or their value is zero, Its just mean they are not allowed to trade on exchange.
Suspension of a company from trading by exchange might be for several reasons but once the suspended company complies with all regulations suspension will be revoked and the shares will start trading again.
Even some companies like 3A Capital Services, Kajaria Securities and Finance and Abhishek Securities offer services of buying shares of suspended companies.
However in these cases price is arrived at by the buyer so it will be with some discount from company’s actual valuation. The service providing companies will have their in-house research teams to value suspended company and arrive to a particular price.
So to add up if you are holding a share of suspended company it does not mean they are worthless, you can start trading once suspension is revoked or you can sell them to third parties for discounted price.
In the above case of yours if a company is suspended and is closed you investment is worthless, but a suspended company does not mean it will be closed.