Files named in this format are often seen in data dumps from non-profits or political entities. If this was sourced from a public leak site, the "review" of the content would depend entirely on the legitimacy of the metadata provided by the leaker. Summary Verdict
Do not attempt to extract this file unless you have verified the source. Donations.part3.rar
Multi-part archives can hide executable scripts or "zip bombs" that trigger once the full sequence is reconstructed. Files named in this format are often seen