His wife is expecting their first child in June, and he had wanted to break the happy news to his father when they meet up next month.
But Mr Abdul Rahim Ahmad's father, Mr Ahmad Suri, was stabbed to death in Lombok, Indonesia, in an alleged knife attack on Saturday at about 9pm.
"My father told my mum that he was coming back to Singapore in February as we didn't get to meet up when he was back briefly in December last year. It is very sad," said Mr Abdul Rahim, 27, a process technician.
Mr Ahmad, 52, was a deputy general manager of an engineering company with a branch in Mataram City in western Lombok. He had been based there for the last two years.
The Singaporean lived in a single-storey terrace house in a gated community with two colleagues from different countries. He had a part-time maid, a driver and a "helper". None of them lived with him, said Mr Abdul Rahim.
On the night he was attacked, Mr Ahmad was alone, as his colleagues were on leave and had gone home.
A neighbour who lives four houses away said he heard passers-by shouting for help, said Mr Abdul Rahim.
He added: "When he heard the shouting, he went to my father's house and saw a man holding a knife. Afraid, he gathered several neighbours and went back. The man then (surrendered and) gave the knife to him."
The neighbour, who is also the estate leader, went into the house and was shocked to find Mr Ahmad covered in blood.
He bundled him into a taxi and rushed him to a hospital, about half an hour's drive away.