The Super Eagles boss says he has not been offered a contract renewal, suggesting he could leave his post following their World Cup exit
Asked if he was going to continue with Nigeria, he said: "I'm not sure. My contract is almost at the end and nobody's talked to me about contract renewal.
"How am I going to stay in a place where I'm not needed?"
The former captain has already achieved significant success with the side, becoming the second man to win the Africa Cup of Nations as a player and as a coach following the 2013 triumph.
Keshi tendered his resignation after the Afcon success, claiming he had been disrespected by the Nigerian FA, with the country's sports minister forced to wade in to settle the matter and convince him to stay on.
He was also owed salary of up to seven months until he went public over the issue and the government resolved the problem.
Speculations in Africa is rife that he could be replace Gordon Igesund as head coach of South Africa.