The report was published two days before athletics’ governing body rules on whether Russian competitors can take part in the Rio Olympics this summer, BBC reports.
In November, Russia’s athletes were banned after a Wada report highlighted widespread failing in testing.
The country’s athletics chiefs had pledged to make wholesale changes.
The latest Wada findings include:
- 73 of 455 tests on athletes could not be collected
- 736 tests were declined or cancelled
- There were 23 missed tests, which the report described as a “significant amount”
- There were 52 adverse findings.