While support for radical Islamists has surged in many Muslim majority countries of late, Jamaat-e-Islami has bucked the trend after failing to banish the taint of siding with Pakistan in Bangladesh's 1971 independence war.
And with its spiritual leader having recently died in prison, top officials languishing on death row and a muted response to protest calls, observers say Jamaat itself could be on its last legs.
"Jamaat has no future unless it transforms itself into a new party and finds a new leadership that can effectively mobilise people and shake off its war-time legacy," Dhaka-based analyst Ataur Rahman told AFP.
Although Prime Minister Sheikh Hasina's Awami League and the main opposition Bangladesh Nationalist Party (BNP) have dominated politics since independence, Jamaat has been a kingmaker and served as a junior coalition partner as recently as 2006.
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But its growing marginalisation was sealed last year when it was banned from a general election after judges ruled its charter conflicted with the country's secular constitution.
That ruling further inflamed supporters already fuming over the trials of around a dozen leaders accused of war crimes in the 1971 conflict.
But although Jamaat's mobilisations last year were a show of strength, the subsequent violence alienated the public.
The first verdicts last year saw hundreds of thousands take to the streets. But there was a tepid response to calls for protests and a strike last week issued after Jamaat assistant secretary general Mohammad Kamaruzzaman's appeal against his death sentence was rejected.
The International Crimes Tribunal, a domestic court, also sentenced Jamaat's supreme leader Motiur Rahman Nizami and a key financier to death in October.