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A three-year-old boy is still missing almost two days after his disappearance from his family's rural property in the NSW Hunter region.

Hundreds of volunteers and police have been scouring bushland for Anthony "AJ" Elfalak around his family's 260-hectare farm at Putty, near Singleton, since he went missing about 11.45 am on Friday.

Police were still searching for a toddler, who has autism and is non-verbal, as of 7 am on Sunday.

Officers were looking into whether an amber alert needed to be issued, indicating AJ had been abducted on Saturday, but are yet to do so.

"At this point in time AJ remains missing, and our search continues," Superintendent Tracy Chapman told reporters on Saturday.

AJ's relatives fear he may have been taken from the property, family friend Alan Hashem wrote in a Facebook post, appealing for community members to keep an eye out for the child.

Image: Supplied