Mariadb – possible to INclude duplicate rows

I have MariaDB version 10.2.14-MariaDB. I have a table that looks like this:

CREATE TABLE `card_data_link` (
    `card_id` INT(11) NULL DEFAULT NULL,
    `data_id` INT(11) NULL DEFAULT NULL,
    INDEX `card_id` (`card_id`) USING BTREE,
    INDEX `data_id` (`data_id`) USING BTREE
)
COLLATE='utf8_general_ci'
ENGINE=InnoDB
;

It has this data:

card_id data_id
"63"    "21"
"34"    "3"
"34"    "21"
"34"    "21"

It joins to this one:

CREATE TABLE `card_data` (
    `data_id` INT(11) NOT NULL AUTO_INCREMENT,
    `data` TEXT NULL DEFAULT NULL COLLATE 'utf8_general_ci',
    PRIMARY KEY (`data_id`) USING BTREE
)
COLLATE='utf8_general_ci'
ENGINE=InnoDB
AUTO_INCREMENT=51
;

It has data that looks like this:

data_id data
"21"    "{R}"
"3"     "{3}"

If I run this query:

select 
    cdl.card_id,
    cdl.data_id,
    cd.data
from
    card_data_link cdl
left join
    card_data cd on cd.data_id = cdl.data_id
group by
    cdl.card_id
    ,cd.data_id

results:

card_id    data_id    data
"34"        "3"     "{3}"
"34"        "21"    "{R}"
"63"        "21"    "{R}"

Is there a way I can get the second

"34"        "21"    "{R}"

row to show up so it returns:

card_id    data_id    data
"34"        "3"     "{3}"
"34"        "21"    "{R}"
"34"        "21"    "{R}"
"63"        "21"    "{R}"

It's like it's doing a select distinct, even though I'm not putting in distinct. Am I not grouping correctly? Thanks!