Howard was honoured with knighthood in the Order of the Bath in 1626, and was a joint-commissioner of the parliament to Charles I the same year.
[6] Acting on a report from the Committee of Safety, in September 1647, the commons decided, but went no further, to impeach Howard, together with six other peers, of high treason.
[10] He was appointed joint commissioner for the office of Earl Marshal of England on 15 June 1673, colonel commandant of three regiments of Cambridgeshire Militia in 1678, and was hereditary visitor of Magdalene College, Cambridge.
[3] In March 1681 he was discharged from the lord-lieutenancy of Suffolk and Cambridgeshire, and from attendance in the king's bedchamber[11] Howard died in December 1688, and was buried on 16 January 1689 at Saffron Walden, Essex.
[13] After December 1681 and before 8 May 1682 Lord Suffolk married Anne (died October 1720),[15] eldest daughter of Robert Montagu, 3rd Earl of Manchester with whom he had no children.