Nava Sihala Urumaya was a member of the DNA until it was sacked from the alliance in November 2010.
The DNA's application for registration as a separate party was rejected by the authorities in January 2011.
This is a significant decline from the 40% national vote Fonseka obtained in the 2010 presidential election when he was endorsed by many notable opposition parties which did not join the DNA at the general election, including the main opposition United National Party and the Tamil National Alliance and decrease from the 39 members the Janatha Vimukthi Peramuna JVP alone had in parliament.
Fonseka was later jailed by court martial and vacated his seat on 7 October 2010.
After a legal battle to maintain his MP status he was replaced by DNA member Jayantha Ketagoda on 8 March 2011.