Finlay, who was chairman of IMLA, is replaced at the association by deputy Charles Haresnape who will take the role on an interim basis until a ballot is held on 20 March.
Finlay said: “I am very sorry to be leaving IMLA but the organisation is in very good shape and with an excellent team of directors in place.
“The organisation has been successful in terms of membership growth, profile and impact and though I am finishing my two year term early I believe it will go from strength to strength. I wish IMLA members and associates all the best for the future.”
Haresnape added: “We are very sorry to see David step down. He has been a great chairman since his appointment in 2012 and had a real impact on the organisation. We wish him well for the future.”