Correct, General. He just had his 34th birthday - celebrating 34 years lived on planet earth. So as he begins his 35th year, he wants to peak at US Open. So he doesn't want to play the back to back Masters. Understandable.
Recall that he lost to Tsonga in the Toronto final, and then won the Cincinnati title. He made the SF of the US Open but the tank was near empty against eventual champion Cilic.
I should mention, don't get the impression Roger just wants to rest... He's working hard on his game in practice. Here is a peek.
Roger practicing on hard court in Switzerland
Respectfully,
masterclass