ATHENS — Since the beginning of Greece’s financial crisis in 2010, two prime ministers have been swept from office after they were forced to adopt an unfeasible package of austerity measures in exchange for a bailout from the troika, as the eurozone authorities — the European Commission, the European Central Bank and the International Monetary Fund — are known. It pains me to watch the same fate befall a third prime minister, my friend and comrade Alexis Tsipras.

In July, when Mr. Tspiras was forced to capitulate to the troika’s latest “program,” it spelled the end of our government. It also caused a split in our party, Syriza, between those who reluctantly agreed to implement the program and the rest of us (approximately 40 Syriza members of Parliament, out of a total of 149) who did not. The general election set for Sept. 20 is a result of this crisis.

For my part, having resigned as finance minister over the troika’s ruthless, humiliating imposition, I plan to sit this one out. I will not contest my parliamentary seat in a sad election that will not produce a Parliament capable of endorsing a realistic reform agenda for Greece.

Nor can I support the adoption of a troika program that everyone knows is destined to fail. There was a clear consensus, shared not only by myself and Mr. Tsipras, but also by Germany’s finance minister, Wolfgang Schäuble, and officials at the International Monetary Fund, that the new bailout deal was not viable.