JSFiddle - React, Tailwind, and code Playground

JavaScript

var countriesString = JSON.stringify([{
    "Country": "Spain",
    "info info1": 0.329235716,
    "info info2": 0.447683684,
    "info info3": 0.447683747
}, {
    "Country": "Chile",
    "info info1": 1.302673893,
    "info info2": 1.357820775,
    "info info3": 1.35626442
}, {
    "Country": "USA",
    "info info1": 7.78805016,
    "info info2": 26.59681951,
    "info info3": 9.200900779
}]);

var countries = JSON.parse(countriesString);

// create new array
var newCountriesArray = new Array();
// exclude some countries
var excludeCountries = new Object();
excludeCountries['Spain'] = true;
// rename some countries
var renameCountries = new Object();
renameCountries['USA'] = 'United States of America';

for (index in countries) {
    if (countries[index].Country in renameCountries) {
        countries[index].Country = renameCountries[countries[index].Country];
    }
    if (!(countries[index].Country in excludeCountries)) {
        newCountriesArray.push(countries[index]);
    }
}
    
alert(JSON.stringify(newCountriesArray));