Bosbach has been one of the most high profile critics of Merkel’s policy of giving Greece more financial aid, arguing that the risk of providing Athens with another bailout was putting German taxpayers at risk.
The 63-year-old former deputy leader of the Christian Democratic Union (CDU) was one of 60 coalition MPs, who last week defied Chancellor Merkel and voted against continuing negotiations for a $95 billion (€86 billion) bailout package for Greece.
He said: "due to [the government's policy towards Greece] I will be giving up my position as chair of the home affairs select committee of the German parliament on September 22nd. From then on I will only be active as a representative of my constituency."
"I cannot and will not go along this path," he added.
Earlier this month Bosbach backed proposals for Greece to take a temporary 'Grexit' from the Eurozone due to the ongoing nature of negotiations between Athens and the country’s creditors.
'I Will Not Vote Against My Convictions'
The former party deputy said he tried to stay loyal to leader Merkel and Finance Minister Wolfgang Schaeuble, but couldn’t justify supporting proposals for a third Greek bailout.
"I throw myself into every battle for Angela Merkel, but I can and will not vote against my convictions in the future."
Bosbach's resignation as the Bundestag’s Home Affairs committee chairman comes as another major blow to Chancellor Angela Merkel, who has been under increasing pressure from the German public and her own MPs over the manner in which Greek debt negotiations have been handled.
Germans Protest In 14 Cities Against Merkel’s Stance On #Greece https://t.co/2mI3sD3YQ5 #EU #IMF #Troika #Austerity pic.twitter.com/G0K8gz0SnC
— Palatino Linotype (@PLinotype) July 19, 2015
Many analysts were surprised at the extent of last week’s Bundestag rebellion against Chancellor Merkel, with 60 MPs defying the party’s position on Greece, with experts commentating that it left Merkel in an increasingly unstable position as leader of the CDU/CSU coalition.
Germans Protest In 14 Cities Against Merkel’s Stance On Greece https://t.co/lHlphBWn9v pic.twitter.com/3f2twXF2ed
— george mastropavlos (@g_mastropavlos) July 20, 2015
Merkel and Schaeuble were accused of destroying decades of political capital that Germany had built up as a result of their hard line taken on Greece during recent negotiations, while others, such as Bosbach, were highly critical of the leaders for agreeing in principle to another Greek bailout.