The billionaire will be present at San Siro to observe the club in which he has purchased a 70 percent stake and then embark upon a rebuilding plan.
Thohir, who now owns a 70 percent stake in the club, will be present at San Siro when the Nerazzurri host Sampdoria in Serie A before embarking upon a series of meetings with key senior figures.
"Will I see Mazzarri? Possibly yes, at the Inter offices. Yes, maybe some of the discussions will be about that [transfer plans]," he told the club's official website. "I have some meetings from 2 p.m. to 7 p.m. today, and I'll have dinner with (predecessor) Mr. Moratti and the family.
"Tomorrow I'll have more meetings but the most important thing of all is Sunday. It's my first game and hopefully we'll have a good game.
Inter sits in fourth place in Serie A ahead of their clash with Sinisa Mihajlovic's side, having accrued 26 points from its first 13 games.