His father Vijay Singh, 51, a co-accused in the dowry death case, on Friday surrendered at the Nangloi police station here. Chillar's mother Sunita is still on the run, police said.
Chillar was arrested from Colaba in Mumbai where he works with the Indian Navy.
"We will present him in a Mumbai court for transit remand to bring him to Delhi for interrogation," a senior police officer said.
A Delhi Police team went to Mumbai on Thursday and arrested Chillar from his staff quarters on Friday morning.
Lalita suicide case: Kabaddi player Rohit Chillar's father Vijay Chillar sent to 14 days judicial custody
Lalita suicide case: Kabaddi player Rohit Chillar's father Vijay Chillar sent to 14 days judicial custody— ANI (@ANI_news) October 21, 2016
A notice was served on Chillar's family on Thursday evening to join the police investigation but they absconded after locking their house.
Lalita, 27, was found hanging by a sash by her father Karan Singh on Monday evening in Delhi. She was staying alone while her in-laws stayed in Kanjhawala in Delhi.
Her marriage to Chillar in March last year was her second.
She left a two-hour audio message and a suicide note in which she wrote: "I am not strong enough to survive this, I have decided to quit."
A case of dowry death was registered against Chillar and his parents on a complaint of Karan Singh.