KATMANDU, Nepal — Nepal’s Parliament on Monday failed a fifth time to select a new prime minister, in a deepening political stalemate fueled by ego and ideology that is alienating the public and crippling the government and economy.

On Monday, after months of political turmoil, legislators repeated the same unsuccessful pattern from four previous attempts to name a new prime minister. The two largest political parties, the Maoists and the smaller Nepali Congress, again fielded rival candidates, and again, leaders of the other political parties claimed neutrality.