Can third party to the suite added at this stage

vague query. it is not stated what is the suit and whether the complicance of the order passed affects third party.

No  the plainitis always dominent litis he can choose his opponant. No one can insist the plainitff ot impleaed third party in proceding unless the the party who willing to join as defendnat is necessary party. But your case at the time of with draw the case no third party canno joint the siut. If any grevinece is there the third party can file suit agsint the plaintiff.