The midfielder’s agent Adrian Aljai claimed earlier in the week that the Black Cats were close to reaching an agreement to sign the Croatian, who has found first-team opportunities hard to come by at White Hart Lane.
However, the former Wigan boss has denied such negotiations and declared he is happy with the business he has done so far this summer in bringing in 10 new faces, including Wes Brown and John O’Shea from Manchester United.
He told Sky Sports News: "I don't know where that's come from.
"As I have said repeatedly now for a couple of weeks, I am very, very pleased with what we have done and if we don't do another thing, I will be delighted with what we have done.
"I don't know where the Kranjcar thing came from. I have seen quotes from his agent - certainly, I have not spoken to Kranjcar's agent, so I don't really know where that has come from."
Meanwhile, Bruce revealed summer recruit O’Shea has a chance of making his debut against Newcastle in the Tyne-Wear derby on Saturday.
He told the Shields Gazette: “I would say John’s 50-50 at the moment.
“He’s just come back into full training, and we wouldn’t want to push him too far too soon, but I know he’s a naturally fit lad and he could still come into the picture.”