Dennis is survived by his brother Jay Felsenstein (Nikki Austin); brother Bruce Felsenstein (Sally Ann); and brother Michael Felsenstein. He was the beloved uncle of Matthew Felsenstein (Maya); Shaina Roy (Christopher); Zachary Felsenstein (Justin Dickstein); Sara Felsenstein (Michael Cianciulli); Daniel Felsenstein (Giselle); Genevieve Felsenstein; and Julia Felsenstein.
He was predeceased by his parents Bernard and Harriet Felsenstein.
A graveside service will be held on Tuesday, September 2, 2025 at 12:30 PM at Beth Israel Cemetery, 1098 Woodbridge Center Drive, Woodbridge, New Jersey 07095. All guests are asked to meet at the cemetery office at 12:00 PM.
Shiva will be observed at the residence of Bruce and Sally Ann on Tuesday after the burial until 8:00 PM and on Wednesday from 3:00 PM to 8:00 PM.
In lieu of flowers, donations in Dennis' memory may be made to the Block Institute (www.blockinstitute.org/donate).
