in 1618 took part in bringing forth treaty of deulino. patriarch filaret, after his return from captivity in 1619, pushed sheremetev aside from state affairs, for the latter disapproved filaret's straightforward anti-polish policy. after filaret's death in 1633 sheremetev came back to politics. in 1634 he was a head of russian delegation (together with alexey lvov) in russo-polish negotiations and signed the treaty of polyanovka.