Myaskovsky's internal disruption, which was already to be recognized in other early works, shows up most impressively in the third symphony.
The very chromatic and nearly already atonal transition leads to a loud and tutti (whole-orchestra) variant of the second theme of the introduction.
The second movement begins with resounding, fanfare-like chords, which lead by a fast development to the main theme of the Rondo.
A further variant of the theme of the first movement, this time so alienated, leads up to the last, surprising section of the symphony: a mourning march in the form A-B-A.
This unusual conclusion show clearly the mind condition at that time of Myaskovsky: The mourning march symbolizes the fright and the hopelessness of the political and social situation in the Russia of 1914.
After the conclusion of the third symphony, Myaskovsky began to be in a way dissatisfied with himself, and he considered giving up composing perhaps completely at least from the front.