Arranging them according to the given information,
Thomas, Jack, Harry, Sam, Yash and Jason are sitting equidistant from each other around a round table facing towards the centre.
1. Harry is between Thomas and Jack.
2. Jason is between Sam and Thomas.
3. Yash is to the right of Sam.
So, "Harry" is sitting in front of Sam.
Hence, "Harry" is the correct answer.