Istanbul officials sought to prevent event from happening
Boris Johnson made comments during Commonwealth meeting in Rwanda
WNBA star detained in Moscow airport in February
Government has deemed her a 'foreign media agent'
Rule takes effect in 2022-2023 season
Gunman opened fire at Oslo gay bar
Government cancelled conference after rights groups announced boycott
Organizers sharply criticized authorities' decision
Calls to embassy phone in Moscow went unanswered on Saturday
State Department officials on Monday met with WNBA star's teammates