On 26th October 1746 Hew Dalrymple 3rd Baronet was born.
From 1763 Hew Dalrymple 3rd Baronet [aged 16] served as an ensign in the 31st Foot, a captain in the 1st Foot from 1768, and the 92nd Foot from 1779.
In 1770 Hew Dalrymple 3rd Baronet [aged 23] and Janet Duff were married. They had eight sons and four daughters.
In 1780 Hew Dalrymple 3rd Baronet [aged 33] was elected MP Haddingtonshire which seat he held until 1786.
In 1783 [his daughter] Janet Dalrymple was born to Hew Dalrymple 3rd Baronet [aged 36] and [his wife] Janet Duff. She married 8th June 1805 Robert Haldane-Duncan 1st Earl of Camperdown, son of Adam Duncan 1st Viscount Duncan and Henrietta Dundas.
In 1786 Hew Dalrymple 3rd Baronet [aged 39] was appointed Auditor of the Excise in Scotland which office he held until his death.
On 13th February 1800 Hew Dalrymple 3rd Baronet [aged 53] died.