Sunayana Dumala, who flew to India after the shooting to be with her husband's family, told the BBC she was "devastated" by his death.
Srinivas Kuchibhotla was shot dead in a bar in Olathe, Kansas. His friend Alok Madasani and an American were injured.
Adam Purinton, 51, has been charged with premeditated first-degree murder.sdfsdfsdft
Ms Dumala said that she had grown anxious about racial hatred after the election of Donald Trump, but she said her husband was "dedicated" to their life in the US and to his job as an engineer.
"Just last week we drove to Iowa to see our friends and their new baby," she said. "When we came back, he was working in the car while I was driving. That's how much he loved working... He personally wanted to do so much for this country."