Former President John Mahama has withdrawn his acceptance as a special African Union (AU) envoy to mediate talks over the political crisis in Somalia.
In a statement on Thursday, Mr Mahama noted the lack of support by the Somali federal government.
He said the proposed assignment required that he “enjoy the unalloyed support and co-operation of all political stakeholders”.
The AU appointed Mr Mahama as its special representative to Somalia on 7 May, but the Horn of Africa country questioned his impartiality.
The country last week formally rejected Mr Mahama’s appointment, citing his “extensive links” with Kenya, saying it was important for such a person to be seen as impartial.
Relations between the two countries have been frayed in recent years, with Somalia accusing Kenya of meddling in its domestic political affairs – which Kenya denies.
A long-running maritime border dispute has also contributed to the stormy relations.