wrapAsync

var func1 = function(query1,callback1) {
    // var result = something ...
    eval(callback1(result));
}

var func2 = function(query2,callback2) {
    // var result = something ...
    eval(callback2(result));
}

var func3 = function(query3,callback3) {
    // var result = something ...
    eval(callback3(result));
}

var func = function() {

    var getFunc1 = function(query1,callback1) {

        func1(query1, function(result1){

            callback1 && callback1( null, result1 );
        })
    };
    var getFunc2 = function(query2,callback2) {

        func1(query2, function(result2){

            callback2 && callback2( null, result2 );
        })
    };
    var getFunc3 = function(query3,callback3) {

        func1(query3, function(result3){

            callback3 && callback3( null, result3 );
        })
    };

    var getAsyncData1 =  Meteor.wrapAsync(getFunc1);
    var getAsyncData2 =  Meteor.wrapAsync(getFunc2);
    var getAsyncData3 =  Meteor.wrapAsync(getFunc3);

    var result1 = getAsyncData1(query1);
    var result2 = getAsyncData2(query2);
    var result3 = getAsyncData3(query3);

    var finalResult = result1 + result2 + result3

    return finalResult;


}