The 24-year-old has returned to training with the rest of the first team after over a month out with an ankle problem and he is hoping to feature against the Foxes this weekend.
"I trained for the first time this week," said Lascelles. "I'll see how I get on."
Newcastle have only picked up one point from their last six outings and the club skipper is hoping he can put and end to that run of results and get the team back on track.
"It's hard to watch, especially when the team is not doing great," he added.
"I feel responsible. I'm trying hard to get back as soon as possible, and fingers crossed it can be Saturday."