A portion from the unfinished song was to be shot in Switzerland, a country whose scenic beauty has been the captured in so many of Chopra's films. He was to travel to Switzerland this month but had to hospitalised for dengue fever on October 13. He passed away on October 21.
Katrina was to wear a white chiffon sari, designed by Manish Malhotra for the song.
"It is sad that we did not get to shoot it (the song). We had zeroed in one a sari out of the 12 that were designed. I remember him (Yash Chopra) saying that it will be a party when we shoot in Switzerland," Katrina told reporters here during the press conference of 'Jab Tak Hai Jaan'.
"We had planned the sequence for the song as in how it will be shot in cold water and all of that. It is unfortunate that I won't be able to do it," she added.
SRK, who has worked with Chopra in several films like 'Darr', 'Dil Toh Pagal Hai', 'Veer Zaara' and others, says a small portion of the song that is remaining to be shot will not happen as it would not anyway match the vision of Chopra.
"Just a minute and a half portion of the song was to be shot in Switzerland which we all wanted to have. For doing that portion of the song we don't have the heart. We will make it impure if we had to shoot... We have enough material for the song," Shah Rukh said.
The film is directed by Yash Chopra and star Shah Rukh, Katrina and Anushka Sharma, It will hit theatres on November 13.