The third sub-series, International Affairs, includes correspondence and related documents detailing the Bishop's activities in overseas affairs. A large number of the folders detail companion diocese relationships with churches in Great Britain and Ecuador, and under the umbrella of this liaison Marmion made visits to both countries. Also included in this sub-series are documents that outline Marmion's opposition to apartheid in South Africa. Believing economic sanctions were key to forcing the South African government to end the racial discrimination of the apartheid system, in 1969 the Bishop chaired a committee to prevent the Episcopal Church from using banks which supported that country's government. Marmion's argument was persuasive, and the church agreed not to utilize banking firms who financed South Africa.