The strategy, Suffolk Lives Matter, details how services across the county are working to reduce the number of suicides.
In Suffolk, 8.7 people per 100,000 died by suicide each year, compared with 8.9 per 100,000 in England as a whole.
Suicide is the third most frequent cause of death in males aged 15-49 in the county and male suicide rates are nearly three times hgher than female rates in Suffolk.
While no single organisation is responsible for preventing suicide, a range of professionals from the voluntary and charity sector, clinical commissioning groups, local councils, police, HealthWatch Suffolk, the coroner’s office and mental health services all play a crucial role.
Suffolk County Council has taken the lead on the new, joint plan.
In a statement read out by Cllr Colin Noble, Leader of Suffolk County Council, the Duke of Cambridge said: “You are all here today at Suffolk Lives Matter to help reduce the number of tragic deaths by suicide in this county and to tackle the stigma so sadly associated with this issue.
“You may know that I, along with my wife, Catherine and brother, Harry have recently launched a campaign – Heads Together – to help change the conversation around mental health.