In this paper, we first give new generalizations for third-order Jacobsthal {Jn(3)}nN and third-order Jacobsthal-Lucas {jn(3)}nN sequences for Jacobsthal and Jacobsthal-Lucas numbers. Considering these sequences, we define the matrix sequences which have elements of {Jn(3)}nN and {jn(3)}nN. Then, we investigate their properties.