"Seconds later, he heard her scream and say she was stabbed."
Her husband immediately flew from Bangalore in India to Australia.
He learned of his wife's death when he landed in Sydney.
Kumar had finished work and was taking a short cut to her Westmead home when she was set upon.
A local found her about 9.30pm and she was rushed to Westmead hospital, where she died about three hours later.
She had been working in Sydney for the tech firm Mindtree since 2012 but was planning to return to India because she missed her husband and 9-year-old daughter too much.
"She last called me three days ago, when she ... complained that work pressure was severe, and she planned to return home for good in April," her aunt, Bharathi Jayachandra, told the Hindu Times.
Kumar's brother who lives in Perth flew to Sydney to identify her, the Hindu Times reports.
Family members say they will take her body back to India for a burial.
Kumar usually worked in the city but on Saturday she had visited a client in Rhodes, News Corp reports. It is believed she had knocked back a lift from work because she didn't want to bother friends.
She took the train home and got off at Parramatta Station about 9pm.
It's believed police have CCTV showing her walking from the station along Argyle St and on to Park Parade.
The path through Parramatta Park cuts between a golf course and Parramatta High School.
She was reportedly attacked near a group of trees, with open spaces on either side, and about 20m from lights.
Police are appealing for any witnesses to come forward.
- AAP