After his premiership, Marijnen remained in active politics and became again a Member of the House of Representatives from 27 April 1965 until 14 January 1966.
Başbakanlığından sonra Marijnen aktif siyasette kaldı ve 27 Nisan 1965'ten 14 Ocak 1966'ya kadar Temsilciler Meclisi Üyesi oldu.