New Jersey Statutes Appendix - Former Title 3A Administration of Estates Decedents and Others 3A § 6-47

A vacancy in a guardianship shall be deemed to arise when a sole or sole surviving or remaining guardian dies or is removed or discharged after entering upon but before completing the duties of his office.

The court granting such guardian letters or the court removing or discharging him or in the case of a guardian of an infant, where letters were granted by the surrogate's court or county court of any county, then the surrogate's court or county court of the county shall have jurisdiction to fill the vacancy by the appointment of a substituted guardian.