The Dutchman finished third and second in the first two weeks of the home-based competition.
Syme donated his prize money to charity.
Englishman takes important victory.
Rory McIlroy has added his name to an already star-studded line-up for September's BMW PGA Championship at Wentworth.
Matthew Fitzpatrick birdied his first four holes on the way to a nine-under 64 and a two-shot lead at the WGC-FedEx St. Jude Invitational.
Bernd Wiesberger was the eventual victor of the Scottish Open following a twilight playoff late on Sunday afternoon.
Bernd Wiesberger was able to follow up his stunning 61 with an impressive 65 to earn a two-shot advantage at the Scottish Open on Saturday.
Austria's Bernd Wiesberger shares the Scottish Open lead heading into the weekend after firing a record-breaking 61.