What does de-listing of a stock mean?
The term "delisting" of securities means removal of securities of a listed company from a stock exchange. As a consequence of delisting, the securities of that company would no longer be traded at that stock exchange. These stocks won't be visible on Kite or Console.
Check out this notification from SEBI.
A company delists for 2 reasons - forced or voluntarily.
Forced delist - This is when the exchanges decide to delist the company, usually for non-compliance. If you are holding shares of such companies, then you will have to write it off as bad investment.
Voluntarily delist - This is when the company itself decides to delist the shares from the exchange. This could be an outcome of a corporate restructuring exercise. Under such a situation, the company has to offer a premium over and above the current market price of the shares. Usually, the premium shoots up to 30-40% or more.
Either way, when delists, the shares are relinquished and is no longer traded in the markets.