Ali Ghufron, Imam Samudra and Amrozi say they will not appeal for clemency [AFP]

The father of an Australian killed in the 2002 Bali nightclub bombings has written to Indonesian authorities urging them not to execute three men convicted over the blasts.

Brian Deegan, whose son Joshua was one of the 202 people killed in the blasts on the resort island, said "no good, only harm" would come from their deaths.

His appeal in a letter released on Friday came a day after an Indonesian court rejected a final appeal by the trio, moving them closer to their executions.

The 2002 bombing was Indonesia's worst terrorist attack

Ali Ghufron, Imam Samudra and Amrozi Nurhasyim can still appeal for clemency to the president, but have repeatedly said they will not do so because such an appeal has to be accompanied by an admission of wrongdoing.

The men have said the attacks, which killed mostly Western tourists but also many locals, were in revenge for Muslim deaths in Afghanistan and elsewhere and that they were sanctioned under their interpretation of Islam.

More than 30 people have been convicted over their roles in the October 12, 2002 attacks.

Deegan said in the letter that he was opposed to the death penalty in all cases, and that his son had shared that position.

Indonesia never reveals when executions are going to take place in advance, and there were no indications on Thursday that their deaths were imminent.

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