Hi Tester,

That dataset is a CSV file. I think you mean add columns for continent and geographical region, not rows. Here is one way to do that

Download and import the dataset

suicideImport = Import["~/Downloads/master.csv", "Dataset", HeaderLines -> 1];

One country's name does not match WL data so rename it

suicide = 
  suicideImport[All, 
   If[#country == "Saint Vincent and Grenadines", <|#, "country" -> "Saint Vincent and the Grenadines"|>, #] &];

Add continent column

suicide = 
  suicide[All, <|#, "continent" -> CanonicalName@CountryData[#country]["Continent"]|> &];

Country and region data is available here, download Excel and import

unsdImport = 
  Import["~/Downloads/UNSD \[LongDash] Methodology.xlsx", {"Dataset", 1}, HeaderLines -> 1];

Generate map from country name to region

regionMap = 
  unsdImport[
     All, <|#"Country or Area" -> 
        If[#"Intermediate Region Name" == "", #"Sub-region Name", #"Intermediate Region Name"]|> &] //
     Normal // Association;

Add region to suicide dataset

suicide = suicide[All, <|#, "region" -> regionMap[#country]|> &]

There are still some issues, country "Czech Republic" has no mapping to region.

Total number of suicides by continent and year

suicide[GroupBy[{#continent, #year} &] /* Values,
 <|
   "continent" -> Query[Max, #continent &], 
   "year" -> Query[Max, #year &], 
   "total_suicides" -> Query[Total, #"suicides_no" &]
 |>]