In absolute terms, Russian deleveraging has been absolutely dramatic. Since 2014, the total amounts of debt outstanding against Russia have shrunk more than 50 percent. The deleveraging stage in the Russian economy actually started in 1Q 2014 (before Western sanctions) and the deleveraging dynamics have been the sharpest during 2014 (before the bulk of Western sanctions). This suggests that the two major drivers for deleveraging have been: economic growth slowdown (2013-1Q 2014) and economic recession (H2 2014-2016), plus devaluation of the ruble in late 2014 – early 2015.
The last chart on the right shows that deleveraging has impacted all BRICS (with exception of South Africa) starting in 2H 2013 – 1H 2014 (except for China, where deleveraging only lasted between 2H 2015 and through the end of 2016, although deleveraging was very sharp during that brief period).
In other words, there is very little evidence that any aspect of Russian debt dynamics had anything to do with the Western sanctions, and all the evidence to support the proposition that the deleveraging is organic to an economy going through the structural growth slowdown period.